Arc Length and Sector Area

What is arc length?

• the entire area of the circle

• the part of the area of a circle

• the entire circumference of a circle

• the length of a piece of the circumference of a circle

When finding arc length, you need to use the ____________ formula for a circle. (spell it correctly)

The radii of a circle create a ____________ angle which equals the arc measure.

• central

• inscribed

• acute

• radial

Find the arc length of AB. Round your answer to the nearest tenth.

• 0.3 cm

• 1.8 cm

• 12.6 cm

• 37.7 cm

Find the arc length of XY. Round to the nearest hundredth.

• 0.19 cm

• 12.22 cm

• 59.69 cm

• 314.16 cm

The diameter of the circle is 24 inches. Find the arc length of CD. Round to the nearest hundredth.

• 12.57 in

• 21.46 in

• 25.13 in

• 75.39 in

Find the length of the arc subtended by an 80^o central angle and a radius of 34 m. Round to the nearest tenth.

What is the length of an arc with a central angle of 180^o and a diameter of 18 centimeters? Round to the nearest tenth.

What is the area of a sector?

• the area of a piece of the circle

• the circumference of the circle

• the area of the entire circle

• the circumference of part of the circle

To find the area of a sector, you need to use the __________ formula for a circle.

• area

• circumference

• arc length