Angles and Equations

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This interesting lesson explores different ways angles can be used in equations to find missing angle measurements. The lesson focuses specifically on adding and subtracting angles. The lesson is designed to follow the Angles and Degrees lesson plan, and can be used in conjunction with other lessons about angles or triangles.

Angles and Equations Lesson Plan Includes:

  • Full Teacher Guidelines with Creative Teaching Ideas
  • Instructional Content Pages about Angles and Equations
  • Hands-on homework activities giving students practice on Angles and Equations
  • Answer Keys
  • Common Core State Standards
  • Many Additional Links and Resources
  • Built for Grades 4-5 but can be adapted for other grade levels.

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Description

This interesting lesson explores different ways angles can be used in equations to find missing angle measurements. The lesson focuses specifically on adding and subtracting angles. The lesson is designed to follow the Angles and Degrees lesson plan, and can be used in conjunction with other lessons about angles or triangles.

Classroom Instruction:

  1. Begin by explaining to students that they can use equations to solve for missing information, like figuring out the unknown degrees of an angle.
  2. While reading the content pages, reinforce vocabulary and give students additional examples of angles and equations problems in order to help them practice the new material. Use the additional resources to enhance understanding.
  3. Introduce the notes on angles and equations. Have students practice problems with and without adjoining sides.  Use the additional resources to enhance understanding.
  4. Have students practice problems with different shapes.
  5. Follow Activity page with students. Copy and draw in the angles for students before the class.  Have students work individually or in pairs to find the missing measurements.
  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 material.
  8. In closing, ask students to explain how they would solve for the missing measurement of three angles with two measurements provided.
  9. Allow for responses and discussion.

Common Core State Standards: 

CCSS.Math.Content.4.MD.C.7

None for Grade 5

Class Sessions (45 minutes): 1 class session

Additional Resources: 

Many more teaching resources in Download!

Want more math resources? Check out our other Math Lesson Plans!

Additional information

Grade Level

4th Grade, 5th Grade

Subject

Math