Lesson Plans (2) | Learning Activities (1) |

View Standards
**Standard(s): **
[MA2015] (4) 24 :

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

This lesson is designed to teach students to measure angles with a protractor. The student will be taught how to read the protractor correctly by using either the top or bottom set of numbers. The lesson will reinforce classifying angles as acute, right, and obtuse. The student will sketch angles given a specified measure.

*This lesson results from the ALEX Resource Gap Project.*

View Standards
**Standard(s): **
[MA2015] (4) 23 :

[MA2015] (4) 24 :

[MA2015] (4) 25 :

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 :

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

[MA2015] (4) 25 :

25 ) Recognize angle measure as additive. When an angle is decomposed into nonoverlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real-world or mathematical problems, e.g., by using an equation with a symbol for the unknown angle measure. [4-MD7]

This investigative lesson allows students to identify angle measurements as part of a larger angle. Students will deconstruct 180 degree angles into equal parts.

This is a College- and Career-Ready Standards showcase lesson plan.

View Standards
**Standard(s): **
[MA2015] (4) 24 :

[ARTS] VISA (4) 2 :

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

[ARTS] VISA (4) 2 :

2) Collaboratively design and create artwork that has meaning and purpose.

Examples: Create a logo for a school or activity.

In this learning activity, students will watch a video to review right, acute, and obtuse angles. Students will create various angles using strips of construction paper. Finally, students will measure their newly created angles with a protractor.

*This activity was created as a result of the Arts COS Resource Development Summit.*