Chapter 8 Circles Lesson 8 3 Tangents Homework

Presentation on theme: "Lesson 8-1: Circle Terminology"— Presentation transcript:

1 Lesson 8-1: Circle Terminology

2 Lesson 8-1: Circle Terminology
Circle DefinitionCircle :The set of points coplanar points equidistant from a given point.The given point is called the CENTER of the circle.The distance from the center to the circle is called the RADIUS.CenterRadiusLesson 8-1: Circle Terminology

3 Lesson 8-1: Circle Terminology
DefinitionsChord :The segment whose endpoints lie on the circle.Diameter :A chord that contains the center of the circle.Tangent :A line in the plane of the circle that intersects the circle in exactly one point.TangentPoint of Tangency :ChordThe point where the tangent line intersects the circle.DiameterSecant :A line that contains a chord.SecantLesson 8-1: Circle Terminology

4 Lesson 8-1: Circle Terminology
Example: In the following figure identify the chords, radii, and diameters.Chords:ODABFCERadii:Diameter:Lesson 8-1: Circle Terminology

5 Lesson 8-1: Circle Terminology
DefinitionsCongruent Circles :Circles that have congruent radii.22Concentric circles :Circles that lie in the same plane and have the same center.Lesson 8-1: Circle Terminology

6 Lesson 8-1: Circle Terminology
PolygonsInscribed Polygon:A polygon inside the circle whose vertices lie on the circle.Circumscribed Polygon :A polygon whose sides are tangent to a circle.Lesson 8-1: Circle Terminology

7 Lesson 8-1: Circle Terminology
ARCSArcs :The part or portion on the circle from some point B to C is called an arc.ABCExample:BSemicircle:An arc that is equal to 180°.OAExample:CLesson 8-1: Circle Terminology

8 Lesson 8-1: Circle Terminology
Minor Arc & Major ArcMinor Arc :A minor arc is an arc that is less than 180°A minor arc is named using its endpoints with an “arc” above.AExample:Major Arc:A major arc is an arc that is greater than 180°.BBOA major arc is named using its endpoints along with another point on the arc (in order).AExample:CLesson 8-1: Circle Terminology

9 Lesson 8-1: Circle Terminology
Example: ARCSIdentify a minor arc, a major arc, and a semicircle, given that is a diameter.Minor Arc:ACDEFMajor Arc:Semicircle:Lesson 8-1: Circle Terminology


Да в шифровалке темно как в аду, черт тебя дери. - Может быть, Стратмор решил посмотреть на звезды. - Джабба, мне не до шуток.

- Ну хорошо, - сказал он, приподнимаясь на локтях.

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