Question

Class 9th
Mathematics Question
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Answer 1

Answer:

OPTION D

Step-by-step explanation:

If we imagine constructing a triangle with P as peak

As PQ=PR, angle PQR=angle PRQ(angles opposite to equal sides are equal)

In a triangle sum of all angles is 180°

So,

Angle QPR+angle PQR+angle PRQ=180°

80°+x+x=180°

2x=100°

x=angle PQR=angle PRQ=50°

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Hope it helps