Circle Terms
Radius
Diameter
Finding Circumference
Formulas
100
What is the distance from the center of the circle to the outside edge?
Radius
100
The diameter of a circle is 20 meters. What is the radius?
10 meters
100
What is the diameter of a circle that has a radius of 12 centimeters?
24 centimeters
100
Find the circumference of the circle below.
84m
100
What is the formula you use for finding circumference?
C=πd
200
What is the straight line that passes through the center of the circle that has endpoints on the circle?
Diameter
200
Find the radius from the given circle.
9 inches
200
The radius of a clock is 6 inches. What is the diameter?
12 inches
200
Find the circumference of the circle below.
108 feet
200
What formula would you use if you are looking for diameter?
d=2r
300
Key words for this are:
Around, Border, Trim, Revolution, Rotation
Circumference
300
Find the radius of the given circle.
18 feet
300
What is the diameter?
24 inches
300
Find the circumference of the circle below.
15 cm
300
What formula would you use to find the diameter?
C=πd
400
What is the amount of space inside of a circle?
Area
400
The circumference of a circle is 18 centimeters. What is the radius?
3 centimeters
400
The circumference of a circle is 36 centimeters. What is the diameter of this circle?
13 centimeters
400
Find the circumference of the circle below.
84 meters
400
What formula would you use to find the distance around a circle?
C=πd
500
What is a line though the circle called?
Chord
500
The circumference of a meteor is 132 meter. What is the radius of this meteor?
22 meters
500
Find the diameter of a circle with a circumference of 150 millimeters.
50 millimeters
500
Find the circumference of both circle combined.
66 inches
500
What formula would you use to find the radius of a circle if you are given the diameter?
r=d/2