Question

If in triangle ABC, If side AB=6√ 3, AC=12 and BC=6,

Q: Answer-If in triangle ABC, If side AB=6√ 3, AC=12 and BC=6, then angle B equals:

In a triangle, if square of one side is equal to the sum of the squares of the other two sides, then the angle opposite the first side is a right angle. In ABC AB 63 cm AC 12 cm BC 6 cm AB2 108 cm2 AC2 144 cm2 BC2 36 cm2 AB2 BC2 108 36 cm2 144 cm2 AC2 AB2 BC2 Pythagoras theorem satisfied. Thus, ABC 90

then angle B equals:

A 120°

B 60°

C 90°

D 45°

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If in triangle ABC, If side AB=6√ 3, AC=12 and BC=6,

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