Circles!!

What is the radius of this circle?

• 18
• 10
• 9
• 8

What is the area of this circle?

• 201.06
• 50.27
• 123.12
• 94.43

What does "circumference" mean?

• Space a circle takes up
• Distance around a circle
• Line from one side of a circle to another
• Line from center of circle to side

Find the length of the bold arc.Leave pi in your answer.

• 5688π ft
• 15.8π ft
• 150.4π ft
• 54,150 ft

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 circumference of circle R.

• $108\pi$

• $1200\pi$

• $\frac{3}{4}\pi$

• $30\pi$

Find the radius of Circle R.

• $4$

• $\frac{45}{2}$

• $45\pi$

• $7$

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

• supplementary
• complimentary
• central
• obtuse

What is x?

• 15

• 23

• 2

• 92

Solve for the missing angle.

• 45^o
• 90^o
• 22.5^o
• 128^o