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The area of a square piece of cardboard is 81 square inches
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The area of a square piece of cardboard is 81 square inches

User Amanuel Nega
by
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1 Answer

7 votes
Lets x = side of square
Area of square = side times side = x * x = x^2

Given:
Area = 81 square inches
so
A = x^2
81 = x^2
x = √81
x = 9

Answer
side = 9 inches
User Matt Altepeter
by
6.0k points
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