Triangle Side Lengths

Explore the properties of triangle side lengths, including the Triangle Inequality Theorem, with this Grade 6 math worksheet.

Grade 6 Math GeometryGeometry 2D ShapesTrianglesTriangle Side Lengths

Use This Worksheet

Includes

2 Short AnswerMultiple ChoiceFill in the BlanksTrue / False

Standards

CCSS.MATH.CONTENT.6.G.A.1

Topics

mathgeometrytrianglesside lengthsgrade 6

7 sections · Free to use · Printable

Triangle Side Lengths Worksheet

Name:

Date:

Score:

Read each question carefully and answer to the best of your ability. Show your work where necessary.

1. What is the Triangle Inequality Theorem? In your own words, explain what it means for the side lengths of a triangle.

2. Which set of side lengths can form a triangle?

2 cm, 3 cm, 6 cm

4 cm, 5 cm, 9 cm

7 cm, 8 cm, 10 cm

1 cm, 2 cm, 3 cm

3. If two sides of a triangle are 5 inches and 12 inches, the third side must be greater than inches and less than inches.

4. A triangle can have side lengths of 10 cm, 10 cm, and 10 cm.

True

False

5. A triangular garden has two sides that measure 15 feet and 20 feet. What are the possible whole number lengths for the third side of the garden?