The area of a square is 144 sqcm. Find the length of the diagonal.
- A.
13 cm - B.
12√2 cm - C.
12 cm - D.
11√3 cm
Correct Answer: Option B
Explanation
Area of a square = x * x
144 = x^{2}
√144 = x
12 = x
But d^{2} = 12^{2} x 12^{2}
= 144 + 144
= 288
d = √288
= √144 x 2
= 12√2