Question

14. In AABC, AB = 6V3 cm, AC = 12 cm and BC = 6cm then 2B = a) 30° ( ) b) 60° c) 90° d) 45°
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Answer 1

Answer:

option (c)

Step by step explanation :

Given : In △ABC

AB=6√3 cm

AC=12cm

BC=6cm

Solution : AC^2 = 144

AB^2 = 108

BC^2 = 36

Since,

AC^2 = AB^2 +BC^2

∴ By Converse of Pythagoras Theorem,

△ABC is an Right Angle Triangle at B.

∴∠B=90°

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