Arc Length and Sector Area

Find the arc length.  Leave your answer in terms of π.

• 7/4π
• 7/2π
• 1/8π
• 45π

Find the length of the bold arc.Leave pi in your answer.

• 5688π ft
• 15.8π ft
• 150.4π ft
• 54,150 ft

Alison is jogging on a circular track that has a radius of 140 feet.  She runs along the track from point R to point N, a distance of 230 feet. Find to the nearest degree, the measure of minor arc RN.

• 47
• 74
• 94
• 123

In circle O, the radius is 4, and the length of minor arc AB is 4.2 feet.  Find the measure of minor arc AB to the nearest degree.

• 90
• 60
• 55
• 113

What is the circumference?

• 48

• 96

• 24

• 18

Find the radius of Circle R.

• $4$

• $\frac{45}{2}$

• $45\pi$

• $7$

Find the circumference of circle R.

• $108\pi$

• $1200\pi$

• $\frac{3}{4}\pi$

• $30\pi$

Find the area of the circle below.

• 8.76 cm²

• 18.52 cm²

• 21.90 cm²

• 28.26 cm²

Find the area of the shaded sector of circle O. The radius is 6 inches and the central angle is 100°. Express answer to the nearest tenth of a square inch.

• 25.2 in²

• 28.5 in²

• 31.4 in²

• 38.2 in²

Find the area of the circle. When a number is written next to the center of the circle, it represents the diameter length. The diameter is 18 in.

• 56.52 in²

• 254.34 in²

• 1017.36 in²

• 113.04 in²