Question

Tick the correct answer and justify : In Δ ABC, AB = 6 3 cm, AC = 12 cm and BC = 6 cm. The angle B is : (A) 120° (B) 60° (C) 90° (D) 45°

Answer 1

(C) 90°

Explanation:

The computation of the angle b is as followS:

Given that,

AB = 6√3 cm,

AC = 12 cm,

And BC = 6 cm

Now squaring all the above ones

AB^2 = 108

AC^2 = 144

And, BC62 = 36

AB^2 + BC^2 = AC^2

It shows the Pythagoras theorem.

Therefore the angle B is a right triangle i.e. 90 degrees

Hence, the correct option is C.