Circumference of a circle

Circumference of a Circle

Answer all questions.

Class: 9C

Multiple Choice

Which image below represents the radius of a circle?

Multiple Choice

The line that passes through the center of the circle is the_____?

• Chord

• Radius

• Diameter

• Circumference

Multiple Choice

What is Circumference?

• The distance around a circle.

• A line that connects the center to a point on the circle.

• A line that passes through the center of the circle.

Multiple Select

What is/are the formula (s) for Circumference?

• C = πd

• C = 2πd

• C = 2πr

• C = πr

Fill in the Blank

A circle has a circumference of 50cm. What is its radius? (round to 2 decimal place).

Use π as 3.14

Fill in the Blank

A circle has a diameter of 5 feet. Find its circumference.

Use π as 3.14

Fill in the Blank

The distance around a circular object is 60 m. What is its diameter?

Use π as 3.14

Poll

How well do you understand circumference of a circle?

• Very well

• Good

• Only understand some parts

• Don't understand it at all