Circumference of a Circle

What is circumference?

• The distance around a circle.

• The space inside the circle.

• The length of the straight line segment that passes through the center of the circle and whose endpoints lie on the circle.

• The line from the center of a circle to any point on its edge.

Find the circumference of the circle

• 87.82in

• 153.86in

• 43.96in

• 307.72in

The distance around a circle.

• Area of a circle

• Circumference

• Volume

• Surface Area

What is the circumference?

• 36

• 18pi

• 108pi

• 36pi

The distance around a circle is called what?

• area

• radius

• diameter

• circumference

Circumference of a Circle Formula when you know the RADIUS

• A = πr²

• C = 2πr

• C = πd

• C = πr

Circumference of a Circle Formula when you know the DIAMETER

• A = πr²

• C = 2πr

• C = πd

• C = πr

What is the radius?

• 18

• 72

• 38

• 14

What is the formula for finding the circumference of a circle?

• C = r²

• C = rd

• A = π·r²

• C = π·d

What is the circumference of a circle?

• the distance around a circle

• the area of a circle

• halfway through a circle

• a line through the center of a circle