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$∆ PQR$ is such that $∠ Q = 90^{o}$ , then which of the following is true?

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$∆ PQR$ is an acute-angled triangle.

$∆ PQR$ is a right-angled triangle.

Both a and b

Neither a and b

answer is B.

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Detailed Solution

In the given $∆ PQR$ , one of the angles is 90^o. So, the given triangle is a right-angled triangle.

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