Question

Find the length of the diagonal of a square if its perimeter is $28$.

• A. $2\sqrt{14}$
• B. $7\sqrt{2}$
• C. $7\sqrt{3}$
• D. $14$

Answer 1

Answer: (B)

$7\sqrt{2}$

Perimeter of the square given is $28$ cm.

So, its side would be $\frac{28}{4}=7$ cm.

Thus, its diagonal would become $7\times \sqrt{2}=7\sqrt{2}$ cm.