Area and Circumference of Circles

Front

The distance halfway across the circle is called the...

Back

radius

Front

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

Back

Radius

Front

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

Back

Diameter

Front

What is the radius of this circle? Options: 18, 36, 9, 6

Back

9

Front

What is the radius of this circle? Options: 12cm, 6cm, 24cm, 3cm

Back

6cm

Front

What is the diameter of this circle? Options: 3.5, 6.5, 6, 7

Back

7

Front

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

Back

10 in

Front

Circumference

Back

The distance around a circle.

Front

Equation to determine the circumference of a DVD with a diameter of 15 millimeters.

Back

c = 15π

Front

A Circle has a diameter of 18 meters. What is the circumference of the circle?

Back

18π or about 56.52 m