Question

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

Answer 1

square of side AB=108

sq of side AC=144

sq of side BC =36

so triangle ABC IS RIGHT ANGLED AT ANGLE B

SO ANGLE B=100