$\"\"$

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The radius of the circle is given by W = 4 units.

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$\"\"$

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radius of the circle Z = 7 units.

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$\"\"$ and XY = 2 units. $\"\"$

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$\"\"$ is the part of the diameter $\"\"$

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$\"\"$ (Apply segment addition postulate)

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

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$\"\"$ (Subtract 2 from each side)

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$\"\"$ units. (Simplify) $\"\"$

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The value of the $\"\"$ units.