Question

Given a semicircle with radius and diameter of $r$ and $d$ respectively, the arc length of a semicircle can be written as

• A. $2\mathrm{\pi r}$
• B. $\mathrm{\pi d}$
• C. $\frac{\mathrm{\pi r}}{2}$
• D. $\frac{\mathrm{\pi d}}{2}$

Answer 1

The correct option is D $\frac{\mathrm{\pi d}}{2}$

Given a semicircle with radius $r$, the arc length of a semicircle can be written as $\frac{2\pi }{2}=\frac{\mathrm{\pi d}}{2}$