Finding Unknown Side Lengths

Finding Unknown Side Lengths

Grade 3 · Math · 45 min

What's Included

Learning Objective

I can find a missing side length of a shape when I know the other side lengths.

Warm-Up Video

Unknown Channel · 5:00

3rd Grade Math 11.3, Algebra, Find Unknown Side Lengths

Practice Questions

7 questions · Short answer

Exit Ticket

Quick comprehension check

A triangle has sides that measure 7 cm, 9 cm, and 5 cm. What is the perimeter of the triangle? A rectangle has sides that measure 12 inches, 6 inches, 12 inches, and 6 inches. What is the perimeter of the rectangle? A shape has sides that measure 8 feet, 8 feet, 8 feet, 8 feet, 8 feet, and 8 feet. What is the perimeter of the shape?

Complete Lesson Package

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Teacher Guide
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