Angles and Degrees

Description

The lesson discusses how to measure an angle in degrees. The lesson illustrates the size of one degree, and explains why there are 360 degrees in a circle. It also demonstrates with illustrations how to use a protractor to measure an angle. Activities are provided so students can practice this new skill. The lesson could be used in conjunction with other lessons related to angles or triangles.

Classroom Procedure:

1. Begin by explaining to students that every angle can be measured using degrees based on a circular center point.
2. While reading the content pages, reinforce vocabulary and give students additional examples of angle and degree problems in order to help them practice the new skill. Use the additional resources to enhance understanding.
3. Introduce the notes on angles and degrees. Have students practice problems estimating angle measurements, use a protractor to check their estimates if possible.  Use the additional resources to enhance understanding.
4. Have students practice problems drawing different angles with various degrees.
5. Follow Activity page with students. Have students work individually as you guide them through the activity.
6. Distribute Practice page. Check and review the students’ responses as a class.
7. Distribute the Homework page. Have students work a few problems at the beginning of the next class to reinforce the new skills.
8. In closing, ask students when have your heard 360, 180, or 90 degrees?
9. Allow for responses and discussion.

Common Core State Standards:  

None for Grade 3

CCSS.Math.Content.4.MD.C.5.B

Class Sessions (45 minutes): 1 class session

Additional Resources:  

• http://www.virtualnerd.com/common-core/grade-4/4_G-geometry/A/1/angle-definition
• http://www.virtualnerd.com/common-core/grade-4/4_MD-measurement-data/C/5/5a/definition-degree
• https://www.turtlediary.com/common-core/CCSS.Math.Content.4.MD.C.5.html

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