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| is a line that intersects a circle at two points |
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| is a line in the same plane as a circle that intersects it at exactly one point |
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| the point where the tangent and a circle intersect |
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| two or more circles are congruent if and only if (iff) they have congruent radii |
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| are coplanar circles with the same center |
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| two coplanar circles that intersect at exactly one point |
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| is the line that is tangent to two or more circles |
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| an arc whose points are on or in the interior of a central angle. The measure is less than 180 degrees. It is congruent to the central angle measure. |
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| is an arc whose points are on or in the exterior of a central angle. Its measure is greater than 180 degrees but less than 360. It's measure is equal to 360 minus the central angle. |
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| an arc of the circle where the endpoints lie on the diameter. The arc measure is always 180 degrees. |
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| are arcs of the same circle that intersect at exactly one point. |
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| are two or more arcs that have the same measure |
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| is the region bounded by two radii of the circle and their intercepted arc. |
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| is a region bounded by an arc and its chord |
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| is the distance along an arc measure in linear units. |
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| is a segment whose endpoints lie on a circle |
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| an angle whose vertex is on a circle and whose sides contain chords of the circle. The measure of the angle is half the measure of the interepted arc. |
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Definition
| consists of endpoints that lie on the sides of an inscribed angle and all the points of the circl between them |
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