Subjects

Math

English Language Arts

Science

Social Studies

Foreign Language

Grades

Pre-K

Kindergarten

1st Grade

2nd Grade

3rd Grade

4th Grade

5th Grade

6th Grade

7th Grade

8th Grade

Worksheets

Games

Build a Worksheet

Word Scramble

Word Search

Crossword Puzzle

Sudoku Generator

Addition Worksheet Generator 

Subtraction Worksheet Generator

Multiplication Worksheet Generator

Division Worksheet Generator

See All

More Resources

Arts & Crafts

Hands-On Activities

CVC Words

Guided Lessons

Common Core State Standards

Common Core Math

Common Core ELA

Roly Recommends

Weekly Recommendations

Early Childhood

Social Emotional Learning

Holidays

Winter

Christmas

Hanukkah

Kwanzaa

Showing Results for of triangle

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

Triangle Angles

Use this glossary with the EL Support Lesson Plan: Triangle Time.

Glossary: Triangle Time

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

Vocabulary Cards: 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.

The Bermuda 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.

Triangle Sort

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

Identifying Triangles: Acute Triangles

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

Treehouse Triangles #2

Find the missing angle in a triangle using addition and subtraction.

Tri-Angles

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

Identifying Triangles: Right Triangles

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

Match That Shape

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

Obtuse Triangles: Identifying Triangles

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

Fact Triangles: Subtraction Within 20

Keep students’ learning on point with this effective and efficient study of the properties of triangles.


Properties of 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.

Sorting Shapes

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

Fact Triangles: Subtraction Within 10

Classifying figures by features is a fundamental geometry skill. Use this lesson plan to teach your students how to categorize triangles by internal angle types. 

Classifying Triangles by Internal Angles

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

Sorting Triangles

This "Treehouse Triangles" worksheets breaks down the geometric process into simple steps. Take angles from archenemy to acquaintance with this worksheet.

Treehouse Triangles #5

Practice geometry in a fun way with this "Treehouse Triangles" worksheet. Get your child to measure angles with ease in this treehouse-themed worksheet.

Treehouse Triangles #4

Use these vocabulary cards with the EL Support Lesson Plan: Fact Family Triangles.

Vocabulary Cards: Fact Family Triangles

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

Everyday Triangles

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

Make Your Own Fact Family Triangles

Focus on fact fluency within 10 in this colorful addition worksheet!

Fact Triangles: Addition to 10

Buster the Builder needs help finding the angles of the walls in this treehouse. Your child will use his geometry know-how to help him out.

Treehouse Triangles #3

Master your addition facts with this colorful, inviting math worksheet!

Fact Triangles: Addition to 20

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

Geometry Review: Angles and Polygons

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

Geometry Task Cards

Is your child in need of a geometry review? This worksheet covers the basic 2-D shapes, from circles and triangles to pentagons and hexagons.

2-D Shapes: Fill in the Table

Strengthen your child's geometry skills with this printable worksheet. Use this resource with your students to classify two-dimensional shapes like parallelograms, quadrilaterals, squares, and triangles.

Categorize These Shapes!

Use this resource to help your students develop their understanding of trapezoids and other two-dimensional shapes. Students will compare the attributes of trapezoids to those of other plane figures, such as triangles and ovals, in this geometry activity.

Geometry: Comparing Trapezoids & Other Shapes

First Grade

Second Grade

Third Grade

Fourth Grade

Fifth Grade

Sixth Grade

Seventh Grade

Eighth Grade

Grade Level

1st - 5th Grade

Common Core

Lesson Plans

Interactive Worksheets

Workbooks

Activities

Exercises

Stories

Songs

Offline Games

Teacher Resources

Teacher Editions

Resource Type

Birthdays

Women's History Month

St. Patrick's Day

Ramadan

Passover

Spring

Easter

Earth Day

Cinco de Mayo

Mother's Day

Memorial Day

Asian Pacific American Heritage Month

Graduation

Summer

Summer Packets

Father's Day

Independence Day

Back to School

Labor Day

Fall

Hispanic Heritage Month

Halloween

Dia de los Muertos

Veterans Day

Thanksgiving

New Year

Martin Luther King Jr. Day

Lunar New Year

Valentine's Day

Presidents' Day

Black History Month

Occasion

Mazes

Dot to Dot

Ball Games

Crossword

Fitness & Exercise

Group Games

Memory Games

Outdoor Games

Printable Board Games

Puzzles & Sudoku

Scavenger Hunt

Travel Games

Word Puzzles

Game Type

Fabric Projects

Beads & Jewelry

Paper & Glue Crafts

Construction & Sculpture

Painting & Drawing

Recycled Crafts

Coloring

Snacks

Mains

Sides

Dessert

Recipes

English Language Support