1. Circle Vocabulary
A Journey into the World of Circles…

2. What is a Circle? A circle is defined as…
The set of all points in a plane that are equidistant from a given point called the center point.

3. Basic Parts of a Circle
Interior of a Circle
Exterior of a Circle

4. . Center of a Circle It’s the point right in the center.
Every point on a circle is exactly the same distance away from it.

5. Segments of a Circle
Chord – a segment whose endpoints are on the circle

6. Segments of a Circle
Diameter – a chord that passes through the center of the circle.

7. Segments of a Circle
Radius – a segment that has the center as one endpoint and a point on the circle as the other endpoint.
Don’t forget… A diameter is made up of two radii

8. Central Angles . A . . C
An angle inside a circle where the vertex of the angle is the center of the circle. B
<ABC is a central angle

9. Recap…
Identify the following by their correct vocabulary name

10. Questions?