Area of Circles, Sectors, & Segments

What is the formula to find the area of a circle?

• πr²

• 2πr

• √π

What is the area of this circle? (Exact answer)

• $4\pi\ m^2$

• $8\pi\ m^2$

• $16\pi\ m^2$

• $\pi$

What is the area of this circle? (Exact answer.)

• $12\pi\ cm^2$

• $6\pi$

• $144\pi\ cm^2$

• $36\pi\ cm^2$

What is the radius of a circle with an area of 49π?

• 49

• 10

• 7

• 14

Tags

CCSS.7.G.B.4

What is the formula for finding the area of a sector?

• $\frac{n}{360}$

• $\pi r^2$

• $\frac{n}{360}\cdot\pi r^2$

Find the area of the sector. Leave your answer in terms of π.

• $6.125\pi\ cm^2$

• $24.5\pi\ cm^2$

• $76.9690200...$

• $1.75\ \pi\ cm^2$

Find the area of the shaded sector of circle O. The radius is 6 inches and the central angle is 100°. Express your answer as an exact value.

• 5π/3

• 10π/3

• 10π

• 40π

How to find the area of a segment?

• $\frac{n}{360}\pi\ -\$ area of triangle

• $\frac{n}{360}\pi r^2-$ area of triangle

• $\frac{n}{360}\pi r^2$

• Area of triangle

What is the area of the shaded region? Leave your answer as an exact value.

• 25π - 50

• 25π - 100

• 5π - 50

• 5π - 100

Tags

CCSS.HSG.C.B.5

What is the area of the shaded segment? (Exact answer.)

•  $\frac{32}{3}\pi-2\sqrt{3}$  

•  $\frac{32}{3}\pi-16\sqrt{3}$  

•  $\frac{16}{3}\pi-16\sqrt{3}$  

•  $\frac{32}{3}\pi+16\sqrt{3}$