Show:
Circumference
Area
Diameter
Arc Length
Sector Area
100

What is the formula for circumference of a circle?

C=pi multiplied by d, or C=2 multiplied by pi multiplied by the radius

100

What is the formula for area of a circle?

The formula of area is pi multiplied by radius to the 2nd power (or pi times radius squared).

100
What is the definition of diameter?
The distance from one point on a circle to another point on a circle, passing through the middle.
100

What is the length of an arc?

A portion of the circumference of a circle.

100

What is sector area (the area of a sector)?

The fraction of the area of an entire circle (like taking a slice of pie).

200

What is the circumference of this circle? If the diameter is 14 yd and pi is 3.14?

43.96 yd

200

What is the area of a circle, with the radius of 12 cm?

452.16 cm2

200

What is the diameter of the circle if the radius is 20m?

40m

200

How do you find the length of an arc?

Multiply the circumference of the circle times the degree of the arc divided by 360 degrees.

OR

Arc times Circumference divided by 360

200

How do you find the area of a sector?

Multiply the area of the circle times the degree of the arc divided by 360 degrees.

OR

Arc times Area divided by 360

300

What is circumference of a circle with a radius of 20 in? If the pi is 3.14?

125.6 in

300

What is the area of a circle, with the diameter of 30 cm?

706.5 cm2

300

What is the diameter if the radius is 2cm?

4cm

300

Find the length of an arc on a circle that is 232 degrees with the radius of 5mm.

*Round to the nearest HUNDREDTH.

20.25mm or 20.24mm

300

Find the sector area of a circle that is 232 degrees with the diameter of 10mm.

*Round to the nearest HUNDREDTH.

50.59mm2 or 50.61mm2

400

What is circumference (in terms of pi), if the area of a circle is 452.16 m2 ?

24pi m

400

What is the area of a circle (in terms of pi), if the circumference is 251.2 in?

1600pi in2

400

What is the diameter (rounded to the nearest tenth) if the area of a circle is 259m2 ?

18.2m

400

Find the length of an arc on a circle that is 73 degrees with the radius of 14.5 ft.

*Round to the nearest HUNDREDTH.

18.46 ft or 18.47 ft

400

Find the sector area of a circle that is 120 degrees with the radius of 14 ft.

*Round to the nearest HUNDREDTH.

205.15 ft2 or 205.25 ft2

500

What is the circumference (in terms of pi), if the area of a circle is 314 cm2 ?

20pi cm

500

What is the area of the circle (in terms of pi), if the circumference is 628 m? If the radius is 3.

10000pi m2

500

What is the diameter (rounded to the nearest tenth) if the circumference is 1,259yd?

401yd

500

Find the angle (to the nearest degree) of an arc whose length is 3.93 ft and circle has a 5 ft radius.

45 degrees

500

Find the angle (to the nearest degree) of an arc whose sector area is 78.5 ft2 and circle has a 10 ft radius.

90 degrees