The Parts of a Circle

Lesson Plan - Get It!

Audio:

A circle is a set of points that are an equal distance from a center point.

• Did you know there are four parts to a circle?
• Did you even know that a circle has parts?

The parts of a circle are shown below.

• What is each of these parts, and why are they important?

The diameter is s line, or chord, that goes from one side of a circle to the other, and passes through the center of the circle.

The radius is a line segment that starts at the center of a circle and goes to its edge, half of the diameter.

The circumference is the distance around the perimeter, or outside, of the circle.

The chord is a line that goes from one side of a circle to the other.

A fun fact about circles is the diameter is always a chord, but a chord is not always a diameter. A chord must run through the center of a circle to be considered the diameter.

Now that you have been introduced to the parts of the circle, move to the Got It? section to practice labeling the parts of a circle on your own.