ALEX Lesson Plans
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Title: Proofs into Practice: The Pythagorean Theorem in the Real World
Description:
The introduction of this lesson has students verifying the famous Pythagorean Theorem with a handson proof. Students will then apply the Theorem in one of two ways: by solving for the side lengths of a right triangle and by determining whether three side lengths could possibly form a right triangle. Finally, students will choose one of two reallife applicataions to explore, using the Pythagorean Theorem.
Standard(s): [MA2013] (8) 22: Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in realworld and mathematical problems in two and three dimensions. [8G7] [MA2013] (8) 21: Explain a proof of the Pythagorean Theorem and its converse. [8G6] [MA2013] (8) 23: Apply the Pythagorean Theorem to find the distance between two points in a coordinate system. [8G8] [MA2013] ALC (912) 8: Determine missing information in an applicationbased situation using properties of right triangles, including trigonometric ratios and the Pythagorean Theorem. (Alabama) [MA2013] GEO (912) 17: Prove theorems about triangles. Theorems include a line parallel to one side of a triangle divides the other two proportionally, and conversely; and the Pythagorean Theorem proved using triangle similarity. [GSRT4] [MA2013] GEO (912) 21: Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.* [GSRT8]
Subject: Mathematics (8  12)
Title: Proofs into Practice: The Pythagorean Theorem in the Real World
Description: The introduction of this lesson has students verifying the famous Pythagorean Theorem with a handson proof. Students will then apply the Theorem in one of two ways: by solving for the side lengths of a right triangle and by determining whether three side lengths could possibly form a right triangle. Finally, students will choose one of two reallife applicataions to explore, using the Pythagorean Theorem.
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Title: The Clock TowerEnhancing mathematics in the career/technical classroom and providing relevance in the mathematics classroom.
Description:
This project resulted from the collaboration of a computer aided drafting teacher (preengineering), Chris Bond, and a math teacher, Lee Cable, (HewittTrussville High School) to provide higher math expectations in CT and real life application in mathematics.
As a handson, technology based project this activity demonstrates use of the Pythagorean Theorem, Sine, Cosine and Tangent to find unknown heights of objects and can be adapted for use by the computer aided drafting or mathematics teacher. Clinometers are used as a surveying tool and AutoCAD is used as a drawing tool. Students use a clinometer and a ruler or a tape measure to find and then record the length and angle measurements of a right triangle to determine unknowns. This information is then used to find unknown lengths and angles and to then create a drawing in AutoCAD. Proportion and scale will be used to draw a scale drawing of the clock tower at the new HewittTrussville High School. In the mathematics classroom, students will produce scale drawings using graph paper instead of AutoCAD. This lesson will need to be adapted for use by other schools by selecting a different building structure for measure.
Standard(s): [AC] K02 (912) 2: Demonstrate the safe handling of drafting design tools according to classroom and environmental practices, procedures, and regulations. [AC] K02 (912) 3: Demonstrate mathematic skills related to drafting design, including basic fractions, scale reading, and conversion of customary to metric and metric to customary measurements. [AC] K02 (912) 8: Utilize CAD software to generate a multiview drawing using appropriate file management techniques, basic drawing commands, and basic dimensioning techniques. [AC] K02 (912) 2: Demonstrate the safe handling of drafting design tools according to classroom and environmental practices, procedures, and regulations. [AC] K02 (912) 3: Demonstrate mathematic skills related to drafting design, including basic fractions, scale reading, and conversion of customary to metric and metric to customary measurements. [AC] K02 (912) 8: Utilize CAD software to generate a multiview drawing using appropriate file management techniques, basic drawing commands, and basic dimensioning techniques. [MA2013] ALC (912) 8: Determine missing information in an applicationbased situation using properties of right triangles, including trigonometric ratios and the Pythagorean Theorem. (Alabama) [MA2013] GEO (912) 21: Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.* [GSRT8]
Subject: Architecture and Construction (9  12), or Mathematics (9  12)
Title: The Clock TowerEnhancing mathematics in the career/technical classroom and providing relevance in the mathematics classroom.
Description: This project resulted from the collaboration of a computer aided drafting teacher (preengineering), Chris Bond, and a math teacher, Lee Cable, (HewittTrussville High School) to provide higher math expectations in CT and real life application in mathematics.
As a handson, technology based project this activity demonstrates use of the Pythagorean Theorem, Sine, Cosine and Tangent to find unknown heights of objects and can be adapted for use by the computer aided drafting or mathematics teacher. Clinometers are used as a surveying tool and AutoCAD is used as a drawing tool. Students use a clinometer and a ruler or a tape measure to find and then record the length and angle measurements of a right triangle to determine unknowns. This information is then used to find unknown lengths and angles and to then create a drawing in AutoCAD. Proportion and scale will be used to draw a scale drawing of the clock tower at the new HewittTrussville High School. In the mathematics classroom, students will produce scale drawings using graph paper instead of AutoCAD. This lesson will need to be adapted for use by other schools by selecting a different building structure for measure.
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Title: I Can Determine The Height Of A Rocket!
Description:
The lesson is intended to give students a fun realworld experience in applying their math skills. They will use trigonometric ratios to calculate heights of tall structures. They will also use the Internet to convert their calculations from standard to metric units and visa versa.
Standard(s): [TC2] CA2 (912) 11: Critique digital content for validity, accuracy, bias, currency, and relevance. [MA2013] AL1 (912) 4: Use units as a way to understand problems and to guide the solution of multistep problems; choose and interpret units consistently in formulas; choose and interpret the scale and the origin in graphs and data displays. [NQ1] [MA2013] AL1 (912) 5: Define appropriate quantities for the purpose of descriptive modeling. [NQ2] [MA2013] AL1 (912) 6: Choose a level of accuracy appropriate to limitations on measurement when reporting quantities. [NQ3] [MA2013] ALC (912) 8: Determine missing information in an applicationbased situation using properties of right triangles, including trigonometric ratios and the Pythagorean Theorem. (Alabama) [MA2013] ALT (912) 39: Define the six trigonometric functions using ratios of the sides of a right triangle, coordinates on the unit circle, and the reciprocal of other functions. (Alabama) [MA2013] GEO (912) 15: Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar; explain using similarity transformations the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides. [GSRT2] [MA2013] GEO (912) 18: Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures. [GSRT5] [MA2013] GEO (912) 19: Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle leading to definitions of trigonometric ratios for acute angles. [GSRT6] [MA2013] GEO (912) 21: Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.* [GSRT8] [MA2013] GEO (912) 39: Use geometric shapes, their measures, and their properties to describe objects (e.g., modeling a tree trunk or a human torso as a cylinder).* [GMG1]
Subject: Mathematics (9  12), or Technology Education (9  12)
Title: I Can Determine The Height Of A Rocket!
Description: The lesson is intended to give students a fun realworld experience in applying their math skills. They will use trigonometric ratios to calculate heights of tall structures. They will also use the Internet to convert their calculations from standard to metric units and visa versa.
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Title: How tall is the school's flagpole?
Description:
The purpose of this lesson is to help students apply math concepts concerning similar triangles and trigonometric functions to real life situations. The students learn how to take these concepts and use them to find measurements of objects that they are unable to measure in conventional ways.
Standard(s): [MA2013] GEO (912) 21: Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.* [GSRT8] [MA2013] GEO (912) 18: Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures. [GSRT5] [MA2013] GEO (912) 19: Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle leading to definitions of trigonometric ratios for acute angles. [GSRT6] [MA2013] GEO (912) 16: Use the properties of similarity transformations to establish the angleangle (AA) criterion for two triangles to be similar. [GSRT3] [MA2013] ALC (912) 10: Critique measurements in terms of precision, accuracy, and approximate error. (Alabama) [MA2013] ALC (912) 8: Determine missing information in an applicationbased situation using properties of right triangles, including trigonometric ratios and the Pythagorean Theorem. (Alabama)
Subject: Mathematics (9  12)
Title: How tall is the school's flagpole?
Description: The purpose of this lesson is to help students apply math concepts concerning similar triangles and trigonometric functions to real life situations. The students learn how to take these concepts and use them to find measurements of objects that they are unable to measure in conventional ways.
Thinkfinity Lesson Plans
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Title: On Top of the World
Description:
If you were standing on the top of Mount Everest, how far would you be able to see to the horizon? In this lesson, students will consider two different strategies for finding an answer to this question. The first strategy is algebraicstudents use data about the distance to the horizon from various heights to generate a rule. The second strategy is geometricstudents use the radius of the Earth and right triangle relationships to construct a formula. Then, students compare the two different rules based on ease of use as well as accuracy.
Standard(s): [MA2013] AL1 (912) 45: Represent data on two quantitative variables on a scatter plot, and describe how the variables are related. [SID6] [MA2013] ALC (912) 8: Determine missing information in an applicationbased situation using properties of right triangles, including trigonometric ratios and the Pythagorean Theorem. (Alabama) [MA2013] ALC (912) 12: Create a model of a set of data by estimating the equation of a curve of best fit from tables of values or scatter plots. (Alabama)
Subject: Mathematics Title: On Top of the World
Description: If you were standing on the top of Mount Everest, how far would you be able to see to the horizon? In this lesson, students will consider two different strategies for finding an answer to this question. The first strategy is algebraicstudents use data about the distance to the horizon from various heights to generate a rule. The second strategy is geometricstudents use the radius of the Earth and right triangle relationships to construct a formula. Then, students compare the two different rules based on ease of use as well as accuracy. Thinkfinity Partner: Illuminations Grade Span: 9,10,11,12
Web Resources
Podcasts
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Title: The Pythagorean Theorem TV
Description:
This website shows videos to help students and teachers understand the Pythagorean Theorem.
Standard(s): [MA2013] (8) 21: Explain a proof of the Pythagorean Theorem and its converse. [8G6] [MA2013] (8) 22: Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in realworld and mathematical problems in two and three dimensions. [8G7] [MA2013] (8) 23: Apply the Pythagorean Theorem to find the distance between two points in a coordinate system. [8G8] [MA2013] GEO (912) 17: Prove theorems about triangles. Theorems include a line parallel to one side of a triangle divides the other two proportionally, and conversely; and the Pythagorean Theorem proved using triangle similarity. [GSRT4] [MA2013] GEO (912) 21: Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.* [GSRT8] [MA2013] GEO (912) 29: Derive the equation of a circle of given center and radius using the Pythagorean Theorem; complete the square to find the center and radius of a circle given by an equation. [GGPE1] [MA2013] GEO (912) 30: Use coordinates to prove simple geometric theorems algebraically. [GGPE4] [MA2013] ALC (912) 8: Determine missing information in an applicationbased situation using properties of right triangles, including trigonometric ratios and the Pythagorean Theorem. (Alabama) [MA2013] MI1 (912) 10: Determine the mathematical impact of the ancient Greeks, including Archimedes, Eratosthenes, Euclid, Hypatia, Pythagoras, and the Pythagorean Society. (Alabama)
The Pythagorean Theorem TV
http://www.mathtv.co...
This website shows videos to help students and teachers understand the Pythagorean Theorem.
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Title: Pythagorean Theorem Rap Song
Description:
This video puts the Pythagorean theorem in realworld terms, helping students visualize examples in which the formula comes into play. The professionally produced music and video is highly engaging for students. For teachers, there are links to song lyrics, activities, and questions. Many Flocabulary videos are only accessible through a paid subscription. *This particular video is available for free and without the need for an account signup.
Standard(s): [MA2013] (8) 22: Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in realworld and mathematical problems in two and three dimensions. [8G7] [MA2013] GEO (912) 21: Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.* [GSRT8] [MA2013] ALC (912) 8: Determine missing information in an applicationbased situation using properties of right triangles, including trigonometric ratios and the Pythagorean Theorem. (Alabama) [MA2013] MI1 (912) 10: Determine the mathematical impact of the ancient Greeks, including Archimedes, Eratosthenes, Euclid, Hypatia, Pythagoras, and the Pythagorean Society. (Alabama)
Pythagorean Theorem Rap Song
http://www.flocabula...
This video puts the Pythagorean theorem in realworld terms, helping students visualize examples in which the formula comes into play. The professionally produced music and video is highly engaging for students. For teachers, there are links to song lyrics, activities, and questions. Many Flocabulary videos are only accessible through a paid subscription. *This particular video is available for free and without the need for an account signup.
Teacher Tools
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Title: The Pythagorean Theorem TV
Description:
This website shows videos to help students and teachers understand the Pythagorean Theorem.
Standard(s): [MA2013] (8) 21: Explain a proof of the Pythagorean Theorem and its converse. [8G6] [MA2013] (8) 22: Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in realworld and mathematical problems in two and three dimensions. [8G7] [MA2013] (8) 23: Apply the Pythagorean Theorem to find the distance between two points in a coordinate system. [8G8] [MA2013] GEO (912) 17: Prove theorems about triangles. Theorems include a line parallel to one side of a triangle divides the other two proportionally, and conversely; and the Pythagorean Theorem proved using triangle similarity. [GSRT4] [MA2013] GEO (912) 21: Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.* [GSRT8] [MA2013] GEO (912) 29: Derive the equation of a circle of given center and radius using the Pythagorean Theorem; complete the square to find the center and radius of a circle given by an equation. [GGPE1] [MA2013] GEO (912) 30: Use coordinates to prove simple geometric theorems algebraically. [GGPE4] [MA2013] ALC (912) 8: Determine missing information in an applicationbased situation using properties of right triangles, including trigonometric ratios and the Pythagorean Theorem. (Alabama) [MA2013] MI1 (912) 10: Determine the mathematical impact of the ancient Greeks, including Archimedes, Eratosthenes, Euclid, Hypatia, Pythagoras, and the Pythagorean Society. (Alabama)
The Pythagorean Theorem TV
http://www.mathtv.co...
This website shows videos to help students and teachers understand the Pythagorean Theorem.

