Triangle Angle Sum Theorem Coloring Activity – Interactive Geometry Practice

Students find missing angle measures in triangles using the Triangle Angle Sum Theorem and Exterior Angle Theorem, then use their answers to complete a color-by-number picture. It is written for high school geometry students.

How it works

The problems focus on the angle sum property of triangles and on applying it to solve for unknown angles. Each answer tells students how to color part of the design.

It takes only 15 to 30 minutes, so it fits classwork, homework or a quick review session.

What’s included

• Triangle angle problems with a color-by-number design
• Instructions
• Answer key for grading

Quick facts

• Grades: 8–10
• CCSS: HSG-CO.C.9, HSG-CO.C.10
• Answer key: included

Bundles and related resources

You can also find this activity in my Congruent Triangles Geometry Curriculum Unit.

Free resources

Get my free Warm Up Slides templates.

Terms of use

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