Question

Q.30 The bisector of the vertical angle of an isosceles triangle bisects the base at-
60°
90°
80°
100°
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Answer 1

Question

The bisector of the vertical angle of an isosceles triangle bisects the base at-

Solution

90°

Reason

It is because, in an isosceles triangle, two sides are equal.

So, opposite angles of two equal sides must be equal. So, only 90° is possible, as it can be broken to 45° inside a triangle.

Rest all angles can only be used in either obtuse or acute triangles.