CBSE NCERT Solutions Chapter 6 Triangles Exercise 6.5 Question 17
17. Tick the correct answer and justify: In
, AB =
, AC = 12 cm and BC = 6 cm. The angle B is:
(A) 120
(B) 60
(C) 90
(D) 45
Solution:
Therefore,
Therefore, by Converse of Pythagoras Theorem,
is right angled at B.
{In a triangle, if square of one side is equal to sum of squares of other two sides then the triangle is right angled.
Therefore, answer is (C)
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