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Circle Terminology

Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

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A circle is labeled by its center. Circle A A B Circle B C Circle C

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Page 1: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

Circle Terminology

Page 2: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

CircleThe set of points in a plane that are a fixed distance from a given point called the center of the circle.

Page 3: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

A circle is labeled by its center.

Circle A

A

B

Circle B

C

Circle C

Page 4: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle
Page 5: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

Chord

• A segment joining two points on a circle

• Example: ABB

CAA

B

Page 6: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

Diameter

• A chord that passes through the center of a circle.

• Example: ABO

A

B

A

B

Page 7: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

Name the following:

Page 8: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle
Page 9: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle
Page 10: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

, or GO

Page 11: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

What is the relationship between the radius and the diameter?

Page 12: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

If you said:

The diameter is twice the radius.

The radius is half of the diameter.

You are absolutely correct.

Page 13: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

What is the………

Page 14: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

Radius = 7 cm

Diameter = 14 cm

Page 15: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle
Page 16: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

Radius = 13 km

Diameter = 26 km

Page 17: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

1. What circle has a diameter of 7 mm?2. What circle has a radius of 7 km?3. What circle has a diameter of 8 m?4. What circle has a radius of 12 m?5. If the circles were drawn to scale, which circle would be the smallest?

Page 18: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle

1. What circle has a diameter of 7 mm? Circle J2. What circle has a radius of 7 km? Circle B3. What circle has a diameter of 8 m? Circle E4. What circle has a radius of 12 m? Circle G5. If the circles were drawn to scale, which circle would be the smallest? Circle J

Page 19: Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle