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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 180 ⁰ )
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 Major Arc- Arc that measures greater than 180˚ Minor Arc- Arc that measures less than 180˚ A portion of the circumference of a circle
Sector The interior formed by a central angle and its intercepted arc (“pie” shape)
Circle: Chord: Radius: Diameter: Secant: Tangent: Major Arc: Minor Arc: Semicircle: Label one of each using the picture given:
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