Circumference and Area of Circles Lesson Quiz

What is the circumference of this circle with a diameter of 12cm?

• 3.14 cm

• 37.7 cm

• 24 cm

• 68.4 cm

Find the length of the arc.

• 31.42cm

• 15.71cm

• 282.74cm

• 23.56cm

In circle O, the radius is 4, and the measure of minor arc AB is 120 degrees. Find the length of minor arc AB to the nearest integer.

• 5
• 9
• 8
• 6

Find the area of the shaded sector of circle O.  The radius is 6 inches and the central angle is 100°.  Express answer to the nearest tenth of a square inch.

• 9.2 sq. in.
• 10.5 sq. in.
• 31.4 sq. in.
• 38.2 sq. in.

When she is outdoors, Tasha, the dog, is tied to a stake in the center of a circular area of radius 24 feet. The angle between her dog house and her favorite hydrant is 165 degrees.  What is the length of the arc from her dog house to the hydrant, following minor arc DG, to the nearest foot.

• 40
• 35
• 55
• 69

Find the area of the sector with a measure of 60 degrees and radius of 10in.

• 52.4 in²

• 18,864 in²

• 60 in2

• 10.47 in

What is the area of the shaded sector?

• 339.12 in²
• 113.04 in²
• 339.29 in²
• None of the above

What is the area of this circle?

• 8322.13
• 1134.11
• 4536.46
• 1267.09

The diameter of the face-off circle on an ice-hockey rink is 30 feet. Find its area.

• 675.6 ft²

• 29.67 ft²

• 545.8 ft²

• 706.9 ft²

A circle has an circumference of 56.52 cm. Find the area of the circle.

• 1017.36 cm²

• 254.34 cm²

• 3194.51 cm²

• 798.63 cm²