Home/Third Grade Math/Week 19: Perimeter/Lesson 6
K-5 friendly lesson
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Perimeter: word problems

Perimeter means distance around a shape. It helps with fences, borders, and paths.

Lesson 6

Concept

Rectangle perimeter formula: P = 2 × (length + width) Example: Length 9 m, width 4 m P = 2 × (9 + 4) = 26 m For any polygon: Add all side lengths.

Try it

Find each perimeter: 1. Rectangle 12 cm by 5 cm 2. Square side 8 in 3. A garden path with sides 6, 6, 4, 4, 3, 3 m 4. A rectangle has perimeter 30 ft and length 9 ft. Find width.