$\"\"$

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Radius of the circle P is given by 5 units.

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$\"\"$ and PR = 3.

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Use the pythagorean theorem to find QR.

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$\"\"$ (Apply Pythagorean theorem)

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Evaluate powers)

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$\"\"$ (Subtract 9 from each side)

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$\"\"$ (Subtract)

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$\"\"$ (Apply square root of each side) $\"\"$

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The value of $\"\"$ .