Circle Terms
The ______ is the distance from the center of a circle to the outside, also half of the diameter.
radius
What is the radius when the diameter of the circle is 6?
3
What is the diameter when the radius is 5?
10
What is the circumference when the diameter is 1?
3.14
What is the area if the radius of the circle is 2?
~12.56
4pi
The ________ is the measure from one edge to the other through the center, also like the width, or height of a circle.
diameter
What is the radius when the diameter is 12?
6
What is the diameter when the radius is 2.5?
5
What is the circumference when the diameter for is 5?
5pi
~15.7
What is the area if the radius of the circle is 3?
~28.26
9pi
The _____________ is the distance around the circle, like the perimeter.
circumference
What is the radius when the diameter of the circle is 27?
13.5
What is the diameter when the circumference is 6.28?
2
What is the circumference when the radius is 5?
31.4
10pi
What is the area if the radius of the circle is 10?
~314
100pi
The ratio of (Circumference)/(diameter) , approximated to 3.14...
pi
What is the radius when the circumference is 9pi ?
4.5
What is the diameter when the circumference of the circle is 314?
100
What is the circumference when the radius is 3.5?
7pi
~21.98
What is the area if the the diameter is 10?
~78.5
25pi
A two-dimensional figure, which is round in shape, where all the points on the edge of the shape are the same distance from the center of the shape.
circle
What is the radius when the area is 9pi ?
3
What is the diameter when the area is 9pi ?
6
(radius is 3)
What is the circumference if the area is 9pi ?
6pi
~18.84
What is the area if the circumference is 25.12?
~50.24
16pi