circlespart1
Post on 11-Sep-2014
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Circles: Circles: VocabularyVocabulary
and and PropertiesProperties
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CircleA set of all points in a plane at a given distance from a given point called the center.
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WHERE?Interior of the circle?Exterior of the circle?
On the Circle?
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RadiusA segment from a point on the circle to the center of the circle.
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EXAMPLES
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ChordA segment whose endpoints lie on the circle.
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DiameterA chord passing through the center of a circle.
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SecantA line that contains a chord.
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EXAMPLES
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Congruent CirclesTwo circles whose radii have the same measure.
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EXAMPLES
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Concentric CirclesTwo coplanar circles having the same center.
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EXAMPLES
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TangentA line in the plane of the circle that intersects the circle in exactly one point.
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EXAMPLES
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A polygon is inscribed in a circle if every vertex of the polygon is a point on a circle.
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The triangle, octagon and square are inscribed in the
circle.
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... and the circle is circumscribed about the polygon.
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Tangent
slim, infinite(adjective)
meets, touches, strokes (verb)
but only at one point(phrase)
PART OF A CIRCLE(definition/description)