Circle Vocabulary and Circumference

Front

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

Back

Diameter

Front

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

Back

Radius

Front

The radius is...

Back

a line from the center point to the edge of the circle

Front

The distance across a circle through its center.

Back

Diameter

Front

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

Back

6cm

Front

What is half the size of a diameter?

Back

Radius

Front

What is twice as long as a radius?

Back

Diameter

Front

The distance all the way around the circle is called the...

Back

circumference

Front

A cruise ship has a large, circular window with a diameter of 6 meters. What is the window's approximate circumference?

Back

18.84 m

Front

The diagram below shows the radius of the circular opening of a bowl. What is the approximate circumference of the opening in centimeters?

Back

59.66