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.

How much does your child know about triangles? Can they figure out the missing angle in each of these triangles?

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.

Have a blast coloring in this mandala made up of triangles and the number 3. This is a great way to remember that a triangle has three sides.

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

On this worksheet, your third-grader will be asked to find the right angles and label them with the right angle symbol.

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!

Do you believe in the Bermuda Triangle? Compare witness accounts of these weird waters and draw your own conclusions in this reading worksheet.

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!

Sarah is not your ordinary spider. She likes to know the exact degrees of every angle in her web. Can you help her calculate the missing angles?

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!

Don't get trapped in the Bermuda Triangle! You'll need to make some swift twists and turns to escape these notorious waters. Are you up for the challenge?

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.