a. What is the length of a semicircle of a circle whose radius is 15 units? b. What is the length of a semicircle of a circle whose radius is $\frac{1}{15}$ unit? a. The length of a semicircle of a circle whose radius is 15 units is units.
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The formula for the circumference of a circle is C = 2πr, where C is the circumference and r is the radius. For the first question, the radius is given as 15 units. So, the circumference of the full circle is C = 2π(15) = 30π units. Show more…
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