Students will love getting to make and cut out their own fact family triangles as they practice writing three related numbers.

Encourage your students to play math detectives by finding the missing base value in a series of obtuse triangles with this helpful geometry worksheet!

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

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

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

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

Help your child learn how to identify an isosceles triangle with this geometry worksheet.

How many sides does a triangle have? Three! Sort shapes that have three sides and shapes that don't have three sides with this wacky worksheet.

Children will take note of the everyday shapes that surround them in this fun geometry activity.

Challenge your third grader to figure out the addition and subtraction patterns on this worksheet.

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.

Give your fourth grader a gentle introduction to geometry with this charming triangle area worksheet.

Model how to find a missing exterior angle with this eighth-grade 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.

Master your addition facts with this colorful, inviting math 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.

Fifth graders review types of angles, triangles, and polygons in this handy geometry review.

What does one semicircle, two parallelograms, three triangles and a rectangle add up to?

Practice your triangles in this fun and easy worksheet that allows you to trace the clown's hats.

Learners sleuth out the area of three triangles in this simple geometry worksheet.

Gain practice drawing your shapes! Trace the triangles in the picture to complete the mountains in the background.

Learners sleuth out the area of three triangles in this helpful geometry worksheet.

Challenge your students to identify or draw 18 different geometric shapes, including polygons, quadrilaterals, and triangles.

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

Give students practice finding the area of triangles using the area formula with this sixth- and seventh-grade geometry worksheet!

Give students extra practice finding the area of triangles using the area formula with this sixth- and seventh-grade geometry worksheet!

On this prekindergarten math worksheet, kids draw a line along the path that shows triangles to get to the barn.

Circles and triangles and squares, oh my! Can your child find all the hidden shapes in this cute coloring page?

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