Chapter 10 Test Review

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

Is the red line a radius or diameter of the circle?

• Radius
• Diameter

What is the radius of this circle?

• 18
• 36
• 9
• 6

A Circle has a diameter of 18 meters. What is the circumference of the circle? (Best Choice)

• 9π or about 28.26 m

• 18π or about 56.52 m

• 81π or about 254.34m

• 324π or about 1017.36 m

Find the circumference of the circle

• 21.98
• 153.86
• 43.96
• 615.44

What is the circumference of a circle with a radius of 21 cm?

• 131.9 cm
• 121.9 cm
• 111.9 cm
• 141.9 cm

A Circle has a radius of 6 inches.  What is the area of the circle? (Best Choice)

• 3π or about 9.42 in²
• 6π or about 18.84 in²
• 12π or about 37.68 in²
• 36π or about 113.04 in² 

A Circle has a radius of 4.  What is the area of the circle? (Best Choice) (note: units are squared)

• 4π or about 12.56
• 16π or about 50.24
• 2π or about 6.28
• 8π or about 25.12

Name a minor arc

• AD
• ADB
• AB
• CD