The area of the square is 81 m2. What is his side equal to?
| January 8, 2021 | education
Brief notation of the problem condition:
S square = 81 sq. cm.;
a =?
Decision:
In a square, all sides are equal. The area of a square is equal to the square of its side. The formula for the area of a square is as follows:
S = a²;
a = √S;
If S = 81, then a = √S = √81 = 9 (see).
Answer: 9 cm.
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