Arc length

Find the arc length of the bolded arc.

• A
• B
• C
• D

A ____ angle is an angle whose vertex is a the center of a circle.

• supplementary
• complimentary
• central
• obtuse

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

Tags

CCSS.HSG.C.B.5

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

• 7π/4
• 7π/2
• π/8
• 45π

If a circle with radius 6 has an arc length of 8 pi, what is the measure of the central angle?

• 120
• 240
• 270
• 360

If a unit circle has an arc length of .6 pi, what is the central angle?

• .6
• .6 pi
• 1 radian
• not enough information