Parts of a Circle

Front

Circle

Back

The set of all points that are equal distance from another fixed point

Front

What is the fixed point that is an equal distance from all the points on a circle?

Back

Center/ Origin

Front

Is the red line a radius or diameter of the circle?

Back

Radius

Front

What is the radius? Options: 18, 72, 38, 14

Back

18

Front

Is the red line a radius or diameter of the circle?

Back

Diameter

Front

What is the diameter? Options: 5 in, 10 in, 3.14 in, 15.84 in

Back

10 in

Front

Is the line shown above the diameter?

Back

No because the line doesn't go through the center of the circle, Not through the center

Front

What is the measurement around the outside of a circle called? Also known as the perimeter of a circle.

Back

Circumference

Front

What is pi?

Back

The ratio of a circle's circumference to its diameter

Front

What is an irrational number?

Back

A number that cannot be written as a fraction