Arc Length

How do I find the LENGTH of an arc?

• Arc MEASURE divided by 360 then 2 times Pi times diameter.

• Arc MEASURE divided by 360 then 2 times Pi times radius.

• Arc MEASURE divided by 180 then 2 times Pi times radius.

• Arc MEASURE divided by 180 then 2 times Pi times diameter.

Tags

CCSS.HSG.C.B.5

The radius of a circle is 30 miles. What is the length of a 180° arc? Enter your answer to the nearest whole mile.

• 60 miles

• 188 miles

• 47 miles

• 94 miles

Tags

CCSS.HSG.C.B.5

The radius of a circle is 8 meters. What is the length of a 90° arc? Round your answer to the nearest tenth.

• 6.3 meters

• 12.6 meters

• 25.1 meters

• 50.2 meters

Tags

CCSS.HSG.C.B.5

The radius of a circle is 9 feet. What is the length of a 180° arc? Round your answer to the nearest tenth.

• 28.3 feet

• 14.2 feet

• 18.6 feet

• 56.5 feet

Tags

CCSS.HSG.C.B.5

The radius of a circle is 9 inches. What is the length of a 135° arc? Round your answer to the nearest tenth.

• 113.1 inches

• 56.5 inches

• 28.3 inches

• 33.3 inches

Tags

CCSS.HSG.C.B.5

The radius of a circle is 1 meter. What is the length of a 135° arc? Round your answer to the nearest tenth.

• 3.5 meters

• 1.2 meters

• 4.8 meters

• 2.4 meters

Tags

CCSS.HSG.C.B.5

The radius of a circle is 8 meters. What is the length of a 45° arc? Round your answer to the nearest tenth.

• 6.3 meters

• 12.6 meters

• 3.5 meters

• 9.6 meters

Tags

CCSS.HSG.C.B.5

The diameter of a circle is 10 inches. What is the length of a 180° arc? Round your answer to the nearest tenth.

• 9.7 inches

• 7.9 inches

• 15.7 inches

• 30.1 inches

Tags

CCSS.HSG.C.B.5

The diameter of a circle is 6 feet. What is the length of a 120° arc? Round your answer to the nearest tenth.

• 3.2 feet

• 6.3 feet

• 12.6 feet

• 9.6 feet

Tags

CCSS.HSG.C.B.5