Lesson Plan - Get It!
Although it looks simple, a circle has four main parts!
- Can you find and name them all?
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 as follows:
Image by Optimager, via Wikimedia Commons, is licensed under the CC BY-SA 3.0 license
What is each of these parts and why are they important?
- Diameter A line, or chord, that goes from one side of a circle to the other, and passes through the center of the circle.
- Radius A line segment that starts at the center of a circle and goes to its edge; half of the diameter.
- Circumference The distance around the perimeter, or outside, of the circle.
- Chord 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.
Since you have been introduced to the parts of the circle, move on to the Got It? section to practice labeling the parts of a circle on your own.