Title: Angles Creator:
Scarlett Submitted By:
Sheila Mitchell, Fairview High School, Cullman County School/Organization:

Fairview High School

Cullman County Schools

Overview:

This is a student-narrated PowerPoint about angles. The student defines different types of angles such as right, acute, obtuse, straight, vertical, interior, and exterior. She also describes angle measurement and application of angle measurement.

Length: 3:00
Aligned to the following ALEX lesson plan:Angles Content Areas: Math Alabama Course of Study Alignments and/or Professional Development Standard Alignments:

MA2015 (4)

23. Recognize angles as geometric shapes that are formed wherever two rays share a common endpoint, and understand concepts of angle measurement. [4-MD5]

a. An angle is measured with reference to a circle with its center at the common endpoint of the rays by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through ^{1}/_{360} of a circle is called a "one-degree angle" and can be used to measure angles. [4-MD5a]

b. An angle that turns through n one-degree angles is said to have an angle measure of n degrees. [4-MD5b]

MA2015 (4)

24. Measure angles in whole-number degrees using a protractor. Sketch angles of specified measure. [4-MD6]

MA2015 (4)

27. Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles. [4-G2]

MA2015 (5)

25. Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category. [5-G3]

Example: All rectangles have four right angles, and squares are rectangles, so all squares have four right angles.

MA2015 (7)

12. Draw (freehand, with ruler and protractor, and with technology) geometric shapes with given conditions. Focus on constructing triangles from three measures of angles or sides, noticing when the conditions determine a unique triangle, more than one triangle, or no triangle. [7-G2]

National/Other Standards:

NCTM geometry expectations for grades 3-5: Identify, compare, and analyze attributes of two- and three-dimensional shapes and develop vocabulary to describe the attributes; make and test conjectures about geometric properties and relationships and develop logical arguments to justify conclusions.