Some questions and their alternative answers are given. Select th… - Vidyadip

Question

Some questions and their alternative answers are given. Select the correct alternative.
Find perimeter of a square if its diagonal is 10 2 cm.
A. 10 cm
B. $40\sqrt 2$ cm
C. 20 cm
D. 40 cm

✓

Answer

We know that,
Diagonal of a square = √2 a
Where 'a' is the side of the triangle.
⇒ √2 a = 10√2
⇒ a = 10 cm
Also, we know
Perimeter of square = 4a
Where 'a' is the side of the triangle
∴ Perimeter of given square = 4(10) = 40 cm

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