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.

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

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

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.

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

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.

Your child will add up the dice to build a fact family number sentence. Then, she will use her math skills to complete the fact family triangle.

Make words from jumbled up letters. As long as the letters are somehow connected in this triangle pattern.

Your child will use his knowledge of inverse operations to build another fact family number sentence and even complete a fact triangle.

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!

Find the facts within the number triangles in this engaging subtraction worksheet!

Build subtraction sentences with fact family triangles in this engaging worksheet!

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.