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GEOMETRY Circle Terminology
Radius (or Radii for plural)The segment joining the center of a circle to a point on the circle. Example: OA
Diameter A chord that passes through the center of a circle.Example: AB
Chord A segment joining two points on a circle Example: AB
Secant A line that intersects the circle at exactly two points.Example: AB
Tangent A line that intersects a circle at exactly one point.Example: AB
Central Angle An angle whose vertex is at the center of a circle.Example: Angle ABC
Inscribed Angle An angle whose vertex is on a circle and whose sides are determined by two chords. Example: Angle ABC
Arc A figure consisting of two points on a circle and all the points on the circle needed to connect them by a single path. Example: Arc AB
Intercepted Arc An arc that lies in the interior of an inscribed angle. Example: Arc AC
Two Intercepted Arcs If angle is inside the circle. Example: Arc ACArc DF
Two Intercepted Arcs If angle is outside the circle. Example: Arc DEArc DC
Circle Terminology GEOMETRY
Other Angle Relationships in Circles Section 10.4
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A chord that goes through the center of a circle
Lesson 10.1 Parts of a Circle Today, we are going to…
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Tangents, Arcs, and Chords
The given distance is called the radius
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Session 25 Warm-up 1.Name a segment tangent to circle A. 2.What is the 3.If BD = 36, find BC. 4.If AC = 10 and BD = 24, find AB. 5.If AD = 7 and BD = 24,
Chapter 12.1 Common Core – G.C.2 Identify and describe relationships among inscribed angels, radii, and chords…the radius of a circle is perpendicular.
Circles Chapter 10.
10.5 Inscribed Angles. An inscribed angle is an angle whose vertex is on a circle and whose sides are determined by two chords. Intercepted arc: the arc.
Warm-Up: 1)simplify: (x – 1)² 2)Factor: 10r² – 35r 3) Factor: t ² + 12t ) Solve: 2x ² – 3x + 1 = x ² + 2x – 3 5) Find the radius of a circle with.
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