Arithmetic Ability
Area

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Q.

If the length of the diagonal of a square is 20cm,then its perimeter must be

View Answer

Correct choice: A

Explanation:

We know that d=√2s Given diagonal = 20 cm => s = 20/2–√ cm Therefore, perimeter of the square is 4s = 4 x 20/2–√ = 402–√ cm.
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