Question

What is the area of a semicircle?

Answer 1

what is the formula for area of a circle?

Answer 2

\(\large\color{black}{ \displaystyle {\rm A_{circle}}=\pi{\rm r}^2 }\)
\(\large\color{black}{ \displaystyle {\rm A_{semi~circle}}={\rm A_{half~of~a~circle}}=\frac{1}{2}\pi{\rm r}^2 }\)

Answer 3

okay so area of a semicircle is 1/2(pi)(r^2)
what is our radius if our diameter is 6?

Answer 4

3

Answer 5

correct
now we plug in 3 for r
and solve for area

Answer 6

9