Math 11 - Lesson 3.4A: Length of an arc, area of a sector

Find the length of the bold arc. Use 3.14 for π.

• 61.2 ft

• 20.4 ft

• 7351.3 ft

• 22,068 ft

• none of those

When she is outdoors, Tasha, the dog, is tied to a stake in the center of a circular area of radius 24 feet. The angle between her dog house and her favorite hydrant is 165 degrees. What is the length of the arc from her dog house to the hydrant, following minor arc DG, to the nearest foot. Use 3.14 for π.

• 40

• 35

• none of those

• 69

• 282

Find the length of the arc to 2dp. Use 3.14 for π.

• 0.63 cm

• 0.62 cm

• 0.31cm

• 6.28 cm

• none of those

• 23.56 in.

• 90 in.

• 36 in.

• 72 in.

• none of those

• 23.6 in.

• 90 in.

• 14.3 in.

• 45 in.

• none of those

Use 3.14 for π. Round to 3 significant figures.

• 23.6 cm

• 90 cm

• 36 cm

• 47.1 cm

• none of those

• 3.5π cm

• 4π cm

• 5π cm

• 6π in.

• none of those

• 3.5π ft

• 4π ft

• 3π ft

• 8π in.

• none of those

• 3.5π in.

• 4π in.

• 3π in.

• 9π in.

• none of those

• 12π cm

• 16π cm

• 13 cm

• 18 cm

• none of those