Radius
Diameter
Circumference
Area
Surprise
100
What is the radius of a circle?
The radius is the distance from one end of the circle to the center of that circle using a straight line.
100
What is the diameter of a circle?
The distance from one end of a circle to the other that goes through the center in a straight line.
100
Which two numbers do you multiply to find the circumference of a circle?
3.14 (pi) and the diameter (d)
100
What is the formula (equation) for the area of a circle?
A= 3.14 X (radius X radius)
100
What is the radius of this circle?
4 cm
200
What is the radius of my circle if the diameter is 26 centimeters?
1. 13 centimeters
200
What is the diameter of my circle if the radius is 6 cm?
12 cm
200
If the diameter is 16 cm, what is the circumference of that circle?
50.24 cm
200
If the radius of the circle is 6cm, what is the area of that circle?
113.04 cm squared
200
What is 800 squared?
640,000
300
What is the radius of my circle if the diameter is 68 feet?
34 feet
300
What is the diameter of my circle if the Circumference is 28.26 cm?
9 cm
300
If the diameter is 24 cm, what is the circumference of that circle?
75.36 cm
300
If the radius of the circle is 15 cm, what is the area of the circle?
706.5 cm squared
300
If the radius is 7 cm, what is the circumference of that circle?
43.96 cm
400
What is the radius of this circle?
6.5 cm
400
What is the diameter of my circle if the circumference is 18.84 cm?
6 cm
400
If the radius is 13 cm, what is the circumference of the circle?
81.64 cm
400
If the diameter of the circle is 20 cm, what is the area of that circle?
31.4 cm squared
400
If the diameter of a circle is 40 cm, what is the area of that circle?
1256 cm squared
500
If the circumference of my circle is 25.12 cm, what is my radius? Hint: Find diameter first!!
4 cm
500
What is the diameter of my circle if the circumference is 37.68 cm?
12 cm
500
If the radius is 30 cm, what is the circumference of the circle?
188.4 cm
500
If the circumference of a circle is 37.68, what is the area of that circle?
113.04 cm squared
500
If the circumference of a circle is 157 cm, what is the area of that same circle?
1,962.5 cm squared