Mathematics

The area of a square is 144 sqcm. Find the length of the diagonal.

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