Circumference of a circle

Front

What is the blue colored part of this circle called?

Back

Circumference

Front

What is the distance around a circle?

Back

Circumference

Front

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

Back

20ft

Front

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

Back

Radius

Front

Does this picture show the diameter or radius of a circle?

Back

Diameter

Front

What is the definition of circumference?

Back

The distance around the circle.

Front

What is the formula to calculate the circumference of a circle?

Back

C = 2πr or C = πd

Front

What does the radius of a circle represent?

Back

The distance from the center of the circle to any point on its edge.

Front

What does the diameter of a circle represent?

Back

The distance across the circle through its center, equal to twice the radius.

Front

If the diameter of a circle is 10ft, what is the radius?

Back

5ft