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.

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

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.

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.

Is it a square? Is it a triangle? This cut and paste worksheet will help your child categorize quadrilaterals, which are four-sided shapes.

What's the connection? Make lines between the dots to create triangles with this dotty worksheet.

This printable worksheet includes six different shapes: Rectangle, circle, hexagon, rectangular prism, sphere, and triangle. Can they match the shape to its name?

All of these pictures are hiding some sneaky triangles. Can your kindergartener find them all in this colorful worksheet?

Find all the triangles in this fun shapes coloring worksheet!

Here's a colorful math challenge for your kindergartener: can he count up all the triangles in the birthday party scene?

Learning simple shapes is fun with this cute printable maze that helps preschoolers practice recognizing triangles.

Can your first graders tell the difference between a square and a cube? How about a triangle and a cone? Use this geometry assessment to gauge your students’ abilities to use attributes to sort 2-D and 3-D shapes.

Teach your students to sort triangles as acute, right, or obtuse based on their internal angle type.

Help students hone their geometry skills with this seventh-grade math worksheet all about creating triangles given specific information.

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

How many triangles do you see? Introduce your young student to shapes and beginning geometry concepts with this fun coloring sheet.

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

This 4th of July picnic is full of shapes! Help your preschooler learn to identify circle, stars, triangles and squares that are hidden in this scene.

Trace, then color, then write, all while getting familiarized with basic shapes: circles, squares, triangles and rectangles.

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

Help your third-grader learn to recognize quadrilaterals with this geometry worksheet.

Are your students ready to learn about equal shares? Then, this worksheet is for them!

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

How can a few triangles and a rectangle make an airplane? Show your kindergarten the magic of shapes with this fun cut and paste activity.

This fun cookie worksheet will help your students learn to divide cookies into halves, thirds, and fourths.

This early geometry worksheet offers fun practice as students learn to identify and compare 2D shapes.

Help your third-grader learn to recognize the identifying features of a polygon on this geometry worksheet.

Help kindergartners learn to distinguish between two- and three-dimensional shapes with this inviting shapes maze!