Question

the perimeter of square piece of cardboard is 80 cm find its area
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Answer 1

Answer:

Perimeter = 4a (a is side of square)

4a = 80 cm

a = 80/4 cm

a = 20 cm

Area = a^2

area = (20cm)^2

Area = 400 cm^ 2

Step-by-step explanation:

Area of a square is equal to square of it's side