Segment and Angle Addition Coloring Proofs – Interactive Geometry Activity

Six proofs, three on segment addition and three on angle addition, give high school geometry students practice writing segment and angle addition proofs. Students complete each proof using geometric properties and postulates, then color each reasoning box according to the color key.

The proofs involve segment and angle addition, substitution, and various properties of equality and congruence. Coloring by the key reinforces the properties and postulates used in each proof. Use the activity in class, for homework, or for test preparation.

What’s included

• Three segment addition proofs
• Three angle addition proofs
• Color key for the reasoning boxes
• Detailed instructions
• Answer keys

Quick facts

• Skill: writing segment addition and angle addition proofs
• Grades: 8–10
• CCSS: HSG-CO.C.9
• Answer key: included

Bundles and related resources

These proofs are also part of my Reasoning and Proofs Geometry Curriculum Unit.

Free resources

Get my free Warm Up Slides templates.

Terms of use

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