The diagonal of a square is 20 cm. What is the length of its side?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → \(10\sqrt{2}\) cm
The diagonal of a square of side \(a\) is \(a\sqrt{2}\).
\(a\sqrt{2}=20\)
\(\displaystyle a=\frac{20}{\sqrt{2}}=\frac{20\sqrt{2}}{2}=10\sqrt{2}\) cm