Circle Vocabulary
Radius
Diameter
Find C or A
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
What is the AREA, to the nearest tenth?
78.5 cm2
100
If you had the diameter, what formula would give you the circumference?
C=pid
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 to the nearest tenth.
113.1 ft
200
If you had the radius, what formula would give you the diameter?
d=2r
300
Other terms for this are:
distance around a circle, outline of a circle, a circle's fence or boundary
Circumference
300
Find the radius of the given circle.
18 feet
300
What is the diameter?
24 inches
300
Find the AREA of the circle below.
19.6 cm2
300
If you have the diameter, what formula would yield the radius?
r=(1/2)d
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? (solve the equation below)
18 =pid
2.9 cm
400
The circumference of a circle is 36 centimeters. What is the diameter of this circle? (solve the equation below)
36=pid
11.5 centimeters
400
Find the circumference of the circle below.
88.0 cm
400
If you have the radius, what formula would give you the circumference?
C=pi*2r = 2pir
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?
21 meters
500
Find the diameter of a circle with a circumference of 150 millimeters.
47.7 millimeters
500
Find the AREA of the square if the radius of the circle is 10.
400 in2
500
If you have the radius, what formula would give the AREA of a circle?
A=pir^2