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 = x2
√144 = x
12 = x
But d2 = 122 x 122
= 144 + 144
= 288
d = √288
= √144 x 2
= 12√2