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| The collection of all points on a plane equal distance from the center |
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| The collection of all points in a space equal distance from the center |
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| A segment from the center to a point a on circle |
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| A segment connecting two points on a circle |
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| A line that intersects a circle in one point called the point of tangency |
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| A line that intersect a circle in two points |
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| An angle whose vertex is at the center of the circle |
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| An angle whose vertex is on the circle |
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| Circles with the same center |
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| A polygon with sides that are Chords |
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| A polygon with sides that are tangents |
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| half of a circle = to 180 |
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| a line that is a tangent to two coplanar circles |
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| does not intersect the segment joining the centers of the two circles |
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| intersects the segment joining the centers |
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