The perimeter of the square is 20cm. Find the perimeter of a square, the width of which is equal to the side

univerkov | September 8, 2021 | education

The perimeter of the square is 20cm. Find the perimeter of a square, the width of which is equal to the side of the square, and the length is 20cm greater than the width.

1. The perimeter of a square is found by the formula P = 4 * a, where P is the perimeter and a is the side. Then we find the side of the square by dividing the perimeter by 4:
a = 20/4 = 5 cm.
2. Width of the rectangle = side of the square = 5 cm. Find the length of the rectangle by adding 20 cm to its width:
20 + 5 = 25 cm.
3. Find the perimeter of the rectangle by the formula P = 2a + 2b, where P is the perimeter of the rectangle, a and b are its sides.
P = 25 * 2 + 5 * 2 = 50 + 10 = 60 cm.
Answer: The perimeter of the rectangle is 60 cm.

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