Circumference and Area of Circles

Front

If my diameter is 19 inches, what is my radius?

Back

9.5 inches

Front

If my radius is 10 ft, what is my diameter?

Back

20 ft

Front

The radius of a circle is...

Back

the measurement from the center of a circle to an edge of the circle.

Front

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

Back

Diameter

Front

How can you calculate the radius from the diameter?

Back

Divide the diameter by 2.

Front

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

Back

Front

What is circumference?

Back

The distance around a circle.

Front

What is the area of a circle?

Back

The space inside the circle.