Areas of Circles

circumference

areas of sectors

arc length

random

100

What is the area of a circle with radius 6m?

113.04 m^{2} or 36pi

100

what is the circumference of a circle with diameter 11m?

34.54m or 11pi

100

what is the area of a sector in a circle with radius 12m and central angle 30 degrees?

37.68 m^{2} or 12pi

100

what is the arc length of a circle with diameter 92m and a central angle of 35 degrees?

28.0855 m or 8.94pi

100

What is circumference?

The distance around a circle.

200

What is the area of a circle with radius 1.5m?

7.065 m^{2} or 2.5pi

200

what is the circumference of a circle with diameter 100.6m?

316.04m or 100.6pi

200

what is the area of a sector in a circle with radius 3m and central angle 45 degrees?

3.5325 m^{2} or 9/8pi or 1.13pi

200

what is the arc length of a circle with diameter 29m and a central angle of 160 degrees?

40.49 m or 116/9pi or 12.89pi

200

What is radius?

A straight line from the center of the circle to the circumference.

300

what is the area of a circle with diameter 11m?

95.03 m^{2} or 30.25pi or 121/4pi

300

what is the circumference of a circle with radius 16m?

100.53 m or 32pi

300

what is the area of a sector in a circle with diameter 11 and central angle 20 degrees?

5.2769 m^{2} or 121/72pi or 1.68pi

300

what is the arc length of a circle with radius 43m and a central angle of 14 degrees?

10.5 m or 301/90pi or 3.34pi

300

What is the formula for diameter?

d = 2r

400

What is the area of a circle with diameter 2.5m?

4.9 m^{2} or 1.56pi or 25/16pi

400

what is the circumference of a circle with radius 12.15m?

76.34m or 24.3pi

400

DAILY DOUBLE!!!!! what is the area of a sector in a circle with diameter = 50m and central angle = 120 degrees?

654.1667 m^{2} or 625/3pi or 208.3pi

400

what is the arc length of a circle with radius 39m and a central angle of 100 degrees?

68.07 m or 65/3pi or 21.67pi

400

A region bounded by 2 radii and an arc is called what?

Sector of a circle or area of a sector

500

If the area of a circle is 115 m2 what is the radius of the circle?

6.05m

500

The circumference of a circle 105m. What is the diameter?

33.439m

500

The area of a circle is 55 m2. The area of a sector in the circle is 13.75 m2. What is the measure of the central angle in degrees?

90 degrees

500

If the arc length of a circle 12m and the circumference of that circle 72m what is the measure of the central angle in degrees?

60 degrees

500

The length of the arc depends on what two things?

1) The measure of the arc.

2) The size of the circle.