Formula
Miscellaneous
Circumference
Area of a Sector
Arc Length
100

The formula for the circumference of a circle, given the radius.

What is C = 2πr?

100
If the diameter is 14 inches, this is the radius.
7 inches
100
Find the circumference, if the radius is 3 ft. Round to the nearest hundredth.
18.85 ft
100

Find the area of the sector, if the radius is 3 m and the central angle is 180 degrees.

14.14 m. sq.

100

Find the arc length, if the radius is 2m and the central angle is 180 degrees.

6.28 m

200

The formula for the area of a circle, given the radius.

What is A = πr2 ?

200

Round the following to the nearest hundredth. 351.3274123

351.33

200
Find the circumference given the diameter is 20 m.
62.83 m
200

Find the area of the sector, if the radius is 9 yards and the central angle is 90 degrees.

63.62 sq yards

200

Find the arc length, if the radius is 15 yards and the central angle is 90 degrees.

23.56 yds

300

The formula for the area of a circle.

What is

300
Given the diameter is 25 cm, what is the radius?
12.5 cm
300
Find the circumference, given the radius is 2 miles.
12.57 miles
300

Find the area of the sector if the circle has a diameter of 4 inches and a central angle of 108 degrees.

3.77 sq inches

300

Find the arc length if the circle has a diameter of 6 inches and a central angle of 108 degrees.

5.65 in

400
The formula for area of a sector, given the radius.


400

Simplify sqrt(48).

4sqrt(3)

400
Find the radius, if the diameter is 13.5 in.
42.41 in
400

Find the area of the sector if the diameter is 20 in and the central angle is 200 degrees.

174.53 sq in

400

Find the arc length of the circle if the diameter is 10 in and the central angle is 200 degrees.

17.45 in

500

The formula for arc length, given the diameter.

s=2pi(d/2)(n/360)
500
Given the diameter is 499.5 mm, find the radius.
249.75 mm
500
Given the circumference is 6.30 feet, find the diameter.
2 feet
500

If the radius is 25 cm and the central angle is pi radians, find the area of the sector.

981.74 sq cm

500

If the radius is 15 cm and the central angle is pi radians, find the arc length of the circle.

15 pi ft

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