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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
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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
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Triangle Side Lengths Worksheet

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Date:

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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?

a

2 cm, 3 cm, 6 cm

b

4 cm, 5 cm, 9 cm

c

7 cm, 8 cm, 10 cm

d

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.

T

True

F

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?

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