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In ΔABC, AB =
AC= 12cm and BC= 6cm. the angle B is:
A. 120° B. 60°
C. 90° D. 45°
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Given that, AB =
AC = 12 cm,
And BC = 6 cm
It can be observed that
AB2 = 108
AC2 = 144
And, BC2 = 36
AB2 +BC2 = AC2
ΔABC, is satisfying Pythagoras theorem.
Therefore, the triangle is a right triangle, right-angled at B
∠B = 90°
Hence, the correct answer is (C)
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