Perimeter (Challenge with decimals)

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Find each answer in cm.

1.A rectangle has an area of 42 cm² and a length of 6 cm. Find its perimeter.

2.A rectangle has an area of 40 cm² and a length of 5 cm. Find its perimeter.

3.Find the perimeter of a rectangle 15 cm long and 9 cm wide.

4.A rectangle has an area of 77 cm² and a length of 11 cm. Find its perimeter.

5.Find the perimeter of a regular polygon with 5 sides of 15 cm.

6.A rectangle has an area of 90 cm² and a length of 9 cm. Find its perimeter.

7.A rectangle has an area of 72 cm² and a length of 9 cm. Find its perimeter.

8.A triangle has sides of 18 cm, 18 cm and 18.5 cm. Find its perimeter.

9.A rectangle has an area of 99 cm² and a length of 11 cm. Find its perimeter.

10.A triangle has sides of 7.5 cm, 19 cm and 20 cm. Find its perimeter.

11.A rectangle has a perimeter of 50 cm and a length of 15 cm. Find its width.

12.Find the perimeter of a rectangle 20 cm long and 4 cm wide.

13.A rectangle has a perimeter of 72 cm and a length of 20 cm. Find its width.

14.Find the perimeter of a regular polygon with 6 sides of 7 cm.

15.A rectangle has an area of 30 cm² and a length of 10 cm. Find its perimeter.

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Find each answer in cm.

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