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

Children find the unknown angles for five triangles, then identify whether the triangle is right, acute, or obtuse, in this geometry worksheet.

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.

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

Find the missing angle in a triangle using addition and subtraction.

Test your knowledge of congruency as you find the missing measures in this geometry worksheet!

Practice solving problems using angle relationships with this seventh-grade geometry worksheet!

Use this glossary with the EL Support Lesson Plan: Triangle Time.

Students explore the relationships between the side lengths and angle measures of triangles in this seventh-grade geometry worksheet!

Use these vocabulary cards with the EL Support Lesson Plan: Triangle Time.

Get more practice solving problems using angle relationships with the second installment of this seventh-grade geometry worksheet! 

Use this one-page geometry handout to help students determine angle relationships with confidence and ease!

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

Once students understand angle basics, challenge them to find missing angles in this exercise!

Does your child need a little more practice finding the area of a triangle? This worksheet will give them all the practice they need!

Give your students targeted practice finding the area of a triangle in this focused geometry worksheet.

Analyze angle relationships with this seventh-grade geometry worksheet!

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

Turn your child into a geometry detective! How many degrees is each missing angle in these quadrilaterals?

Help your students explore angle relationships and transversals of parallel lines with this eighth-grade geometry worksheet! 

Learn some basic geometry with this worksheet all about the angle.

This fun puzzle provides lots of angle practice for your child. Can they figure out which way the boat is facing after the last turn?

Use this one-page guided notes template to help learners cement their understanding of angle relationships!

Strengthen your knowledge of angle relationships with this helpful seventh-grade worksheet!

Find missing angles and side lengths in this tricky geometry worksheet!

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

Know a good geometry detective? Challenge your student to use the formula for calculating the area of a triangle.

Can your kindergartener recognize triangles? Give her some extra practice with this worksheet. She'll draw triangles and pick them from a box of other shapes.

Master congruent figures in this eighth-grade geometry worksheet!

Build student understanding of the defining attributes of triangles with this sorting activity. Students will cut out different shape cards and sort them into examples and non-examples of triangles.