This eighth-grade geometry worksheet introduces students to the Triangle Angle Sum Theorem and has them practice finding a missing interior angle in a triangle.

Get more practice finding the measures of missing interior and exterior angles of triangles with this geometry worksheet!

Model how to find a missing exterior angle with this eighth-grade geometry worksheet!

Give your students practice finding diagonal distances between two points with this two-page geometry worksheet!

Find the measures of missing interior and exterior angles of triangles with this geometry worksheet!

Students use the Triangle Angle-Sum Theorem to solve for the variable in triangles where two or more angle measures are linear algebraic expressions.

Students use the Exterior Angle Theorem to solve for the variable in triangles where two or more angle measures are linear algebraic expressions.

Students practice using the converse of the Pythagorean theorem to identify right triangles with this geometry worksheet!