Parts of Circles
Circles Questions
Area
Circumference
Central Angles
Central Angles 2
100
What is the distance around the outside of the circle?
Circumference
100
What is the radius of a circle with a diameter of 10 ft?
5 ft
100
What is the area formula for a circle?
A = 3.14 * r 2
100
What is the circumference formula for a circle?
C = 3.14 * d OR C = 2 * 3.14 * r
100
Find m∠arc PRQ.
m∠arc PRQ = 275°
100
x=220
200
What is the line segment that goes from the center of the circle to ONE side.
Radius
200
What is the diameter of a circle with a radius of 8 in?
16 in.
200
What is the area of a circle that has a radius of 9 cm?
254.34 cm2
200
What is the circumference of a circle with a radius of 8 miles?
50.24 miles
200
Find m∠arc BC.
m∠arc BC = 57°
200
40 degress
300
The distance ACROSS the circle from edge to edge, goes through the center of the circle.
Diameter
300
What is the diameter of a circle with a radius of 3.347 m?
6.694 m
300
What is the area of a circle that has a radius of 3.5 miles?
38.465 mi2
300
What is the circumference of a circle with a diameter of 30 ft?
94.2 ft
300
Find m∠arc CD. 
m∠arc CD = 55°
300
AB or BD
400
The measure of the inside of a circle, measured in square units
Area
400
What is the diameter of a circle with a circumference of 72.22 miles?
23 miles
400
What is the area of a circle that has a diameter of 22 meters?
379.94 m2
400
What is the circumference of a circle with a radius of 14.25 cm?
89.49 cm
400
Find m∠arc QP.
m∠arc QP = 45°
400
What is the measure of arc AB?
142 degrees
500
The relationship between a circle's circumference and diameter is calculated to be what value?
Pi or 3.14
500
What is the radius of a circle if it has a circumference of 56.52 inches?
9 inches
500
What is the area of a circle with a diameter of 41.25 inches?
1335.73 in2
500
What is the circumference of a circle with a diameter of 9.75 km?
30.615 km
500
Find m∠arc QTR.
m∠arc QTR = 306°
500
What do you call an arc that measures exactly 180 degrees
Semicircle