Circle Terms
Finding Radius
(find the radius for all)
Finding Diameter (Find Diameter for all)
Finding Circumference(Find Circumference for all)
Mystery
100

What do we call the dot placed in the middle of a circle?

What is the center?

100
The Diameter of this circle is 5
What is 2.5
100
The radius of this is 5
What is 10
100
The diameter for this circle is 10
What is 31.4
100

To multiply by a number is to divide by its...

What is reciprocal?

200

Any line from the center of the circle to the outer edge of a circle. This is also half of the diameter.

What is the radius?

200
The diameter is 12
What is 6
200
The radius of this circle is 2.5
What is 5
200
The diameter for this circle is 13
What is 40.82
200

What is the reciprocal of 4?

What is 1/4th?

300

A line through the center of the circle that cuts it in half

What is a diameter?

300
The diameter of this circle is 27
What is 13.5
300
The circumference of this circle is 15.7
What is 5
300
The diameter of this circle is 25
What is 78.5
300

The relationship between two categories (x and y)

What is the constant of proportionality?

400

The length around a circle

What is circumference?

400
The diameter of this circle is 437
What is 218.5?
400
The circumference of this circle is 18.84
What is 6
400
The radius for this circle is 45
What is 282.6
400

When all of the values in a table have the same constant of proportionality, we say that the relationship is...

What is proportional?

500

The constant of proportionality that we use to find circumference. It is also represented by 3.14 

What is pi?

500
The diameter of this circle is 0.325
What is 0.1625
500
The diameter of this circle is 194.68
What is 62
500
The Diameter for this circle is 3285
What is 10314.9
500

What is the constant of proportionality between an x value of 16 and a y value of 4?

What is 0.25?

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