Perimeter of a Rectangle - Free Printable

To find the perimeter of a rectangle, you add up the lengths of all four sides. Since opposite sides of a rectangle are equal, you can use this formula:

Perimeter = 2 × (Length + Width)

Let’s solve each problem step by step.

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1) Rectangle with length 9 cm and width 3 cm

Perimeter = 2 × (9 + 3)
= 2 × 12
= 24 cm

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2) Rectangle with length 6 in and width 4 in

Perimeter = 2 × (6 + 4)
= 2 × 10
= 20 in

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3) Square with side 7 ft *(Note: A square is a special rectangle where all sides are equal)*

Perimeter = 2 × (7 + 7)
= 2 × 14
= 28 ft

*(Alternatively, for a square: Perimeter = 4 × side = 4 × 7 = 28 ft — same answer!)*

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4) Rectangle with length 10 m and width 4 m

Perimeter = 2 × (10 + 4)
= 2 × 14
= 28 m

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5) Rectangle with length 8 m and width 7 m

Perimeter = 2 × (8 + 7)
= 2 × 15
= 30 m

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6) Square with side 20 cm

Perimeter = 2 × (20 + 20)
= 2 × 40
= 80 cm

*(Or: 4 × 20 = 80 cm — same result!)*

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Final Answer:
1) 24 cm
2) 20 in
3) 28 ft
4) 28 m
5) 30 m
6) 80 cm