Central Angles and Arc Length and Area

Which is true of a minor arc?

• It forms half a circle.

• It forms a whole circle.

• It measures greater than 180 degrees. 

• It measures less than 180 degrees.

Which is true of a major arc?

• Forms half a circle.

• Forms a whole circle.

• Measures greater than 180 degrees.

• Measures less than 180 degrees.

The sum of all the measures of the arcs around a circle equals ___.

• 100

• 180

• 360

• 720

Find the measure of arc JKM

Find the measure of arc JM

• A
• B
• C
• D

Solve for x.

• x = 6.45

• x = 8

• x = 12.6

• x = 7

What is the measure of arc AB?

• 140

• 142

• 180

• 153

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

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

• 7/4π

• 7/2π

• 1/8π

• 45π