Circle Vocabulary and Circumference

Front

What is half the size of a diameter?

Back

Radius

Front

I want the circle filled in. I want the __________.

Back

Area

Front

The distance across a circle through its center is called?

Back

Diameter

Front

I want to know the distance around the building (rectangle). I want the __________.

Back

Perimeter

Front

I want the distance around the edge of the circle. I want the __________.

Back

Circumference

Front

What is the distance around a circle called?

Back

Circumference

Front

What is the longest distance across a circle?

Back

Diameter

Front

What do you call a line segment that connects two points on a circle?

Back

Chord

Front

What is the term for the center point of a circle?

Back

Center

Front

What is the formula for the circumference of a circle?

Back

C = 2πr or C = πd