Which of the following figure are obtuse isosceles triangles?

AN

P and R only

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Q and R only

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P,R and S only

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P,Q and R only

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Solution

The correct option is A
P and R only

Obtuse angled triangle is the one in which one of the angles is obtuse. Isosceles triangle is the one in which two sides are equal.

1. Fig. P - obtuse isosceles triangle.

2. Fig. Q - acute isosceles triangle.

3. Fig. R - obtuse isosceles triangle..

4. Fig. S - right angled isosceles triangle.

Hence, only P and R are obtuse isosceles triangles.

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