Define a circle and Identify the parts of a circle

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Circle

• Is the set of all points in a plane that are
  equal distance from the center. This circle is
  called Circle P.

P
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Terms Involving Circles

• Radius A segment from the center to a point on
  the edge of the circle.

Radius
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More Terms

• Diameter Is a line segment containing the
  center point with the line segments end points on
  the circle.

Center of the Circle
Diameter
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Just a few more...

• Chord Is a line segment that joins two points
  on a circle.
• Tangent Is a line that lies in the plane of the
  circle and meets the circle in exactly one point,
  called the point of contact, which is point T
  above.
• Secant Is a line that passes through a circle
  at two points.

Y
T
X
B
A
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Other Parts of Circles

• Arc is a part of a circle. There are three types
  of arcs.
• Semicircle arc ABC
• Minor arc BC
• Major arc CAB

B
C
M
A
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Yes, More Parts ...
Inscribed Angles created when two chords have a
common endpoint. Central Angle created when
two radii meet at the center point Intercepted
Arcs the arc created between the two endpoints
of an inscribed angle.
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Calculations with Circles

• Circumference
• Area