Circle Arcs

Circles, Sectors, and Arcs

Practice for next week's quiz!

Area, Circumference, and Arc Length

Use your formulas to solve the following questions about circles, sectors, and arcs.

Multiple Choice

A circle has a diameter of 15 in.

Find the EXACT length of the arc corresponding to a sector with a central angle of $$150\degree.$$  

Arc Length = ______ inches

• $$\frac{\pi}{10}$$  

• $$36\pi$$  

• $$\frac{25\pi}{4}$$  

• $$\frac{15\pi}{2}$$  

Multiple Choice

The length of an arc with central angle  $$90\degree$$  is $$10\pi$$  cm. What is the RADIUS of the circle? 

• 40 cm

• 20 cm

• 10 cm

• 5 cm

Answer: 20 cm