Question

*If diagonal of a square is of length 10√2 cm then the perimeter of square is ...............cm.*

1️⃣ 40
2️⃣ 10
3️⃣ 30
4️⃣ 50​

Answer 1

Answer: 1️⃣ 40

Explanation:

x - is the side of the square

`x^(2) +x^(2) =(10√(2))^(2) \\2x^(2)} =200\\2x^(2) / 2=200 / 2 \\x^(2) =100\\x=√(100) \\x=10 \: [cm] - side \: of \: a \: square`

Find the perimeter of the square.

Perimeter of the square = 4 × 10 cm = 40 cm