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

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

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

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

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?

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

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

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

This worksheet will introduce your child to the three types of triangles: the equilateral triangle, the isosceles triangle and the scalene 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.

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.

Let your fourth grader play triangle detective: can she spot the acute triangles on this 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.

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

These "Treehouse Triangle" worksheets break down the geometric process into easy, solvable steps.

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

This cruise ship could sure use your help figuring out which direction to go. Have your student color all the triangles and squares to find the island.

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

If your kid loves music, try this fun approach to learn the guitar! He'll get to know the basic parts of the guitar and the notes it plays.

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

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

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

Learn some of the common Morse code prosigns with this fun activity!

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.

Does your child know the features of an isosceles triangle? Have him try out this worksheet that serves as a quick intro to middle school geometry.