Question

The area of a square is 81 square centimeters. First, how do you find the length of a side Then find the length of the diagonal?

Answer 1

$(side)^{2} = 81 \\ side = \sqrt{81} \\ side = 9cm \\ digonal = \sqrt{2} \times side \\ d = \sqrt{2} \times 9 \\ d = 1.414 \times 9 \\ d = 12.726cm$

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