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.

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?

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

Help your child practice identifying equilateral triangles on this geometry worksheet.

This colorful worksheet asks your fourth grade geometry detective to practice identifying right triangles.

Help your child learn to recognize scalene triangles with this worksheet.

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

See if your child can find all the triangles hidden on this geometry worksheet.

On this geometry worksheet, your third-grader will look at the different triangles and label them as equilateral, isosceles, or scalene

Is your fourth grader reluctant to practice geometry? This colorful worksheet, which explores obtuse triangles, may be just what he needs!

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?

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.

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

This worksheet challenges your preschooler to decide which two triangles are the same shape and size.

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

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

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

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.

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

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