Arcs and Central Angles Arc Length

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

• 100

• 180

• 360

• 720

If the measure of arc ABC = 210°, what is the measure of arc AC?

• 150°

• 100°

• 210°

• 105°

The measure of an arc is equal to the measure of the central angle that intercepts the arc. Find x.

• x = 160

• x = 40

• x = 80

• x = 360

• A
• B
• C
• D

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

• 7/4π

• 7/2π

• 1/8π

• 45π

What is the arc length of minor arc AB?

• 5.23

• 103

• 33.33

• 50

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

• 7/4π

• 7/2π

• 1/8π

• 45π

Lin thinks that the central angle in circle A is

congruent to the central angle in circle B. Do you

agree with Lin? Show or explain your reasoning.

• I agree. The ratios of the arc length to the radius are equivalent.

• I disagree. The ratios of the arc length to radius are not equivalent.

• a
• b
• c
• d

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

• 7/4π

• 7/2π

• 1/8π

• 45π