Question -
Answer -
(A) 120° (B) 60° (C) 90° D) 45°
Solution
Given, in ΔABC, AB = 6√3 cm, AC = 12 cmand BC = 6 cm.
We can observe that,
AB2 = 108
AC2 = 144
And, BC2 = 36
AB2 + BC2 = AC2
The given triangle, ΔABC, is satisfying Pythagoras theorem.
Therefore, the triangle is a right triangle, right-angled at B.
∴ ∠B = 90°
Hence, the correct answer is (C).