Unit 6 Day 1 Circle Vocabulary.

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Presentation transcript:

Unit 6 Day 1 Circle Vocabulary

In your pairs look up the definitions for your vocabulary words.

Circle All points equidistant from a given point called the center

Semicircle Half of a circle (Arc of a circle that measures 180⁰)

Radius A segment from the center to a point of the circle *Note all radii of the same circle are congruent

Diameter A special chord that passes through the center

Chord A segment whose endpoints are on the circle

Secant A line which intersects the circle in two points

Tangent A line which intersects the circle in one and only one point

Arc A portion of the circumference of a circle Major Arc- Arc that measures greater than 180˚ Minor Arc- Arc that measures less than 180˚

Sector The interior formed by a central angle and its intercepted arc (“pie” shape)

Circle: Tangent: Chord: Major Arc: Radius: Minor Arc: Diameter: Label one of each using the picture given: Circle: Tangent: Chord: Major Arc: Radius: Minor Arc: Diameter: Semicircle: Secant: