If the length of the diagonal of a square is 20cm,then its perimeter must be
a. 40√2cm b. 30√2cm c. 10cm d. 15√2cm
A) a B) b C) c D) d
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Step-by-step 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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