Central Measurement and Arc Length

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

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. (HINT: minor arc AB is equal to

• 90

• 60

• 55

• 113

• Sam and Zoha

• Amanda and Jia
  

• Jia and Sam

• Zoha and Amanda

A circle is drawn to represent a pizza with a 12 inch diameter. The circle is cut into eight congruent pieces. What is the length of the outer edge of any one piece of this circle? (HINT: If the circle is cut into 8 congruent pieces, how many degrees would each slice account for?)