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radius
half of the diameter
center
the center of the circle
chord
a segment whose endpoints are on a circle
diameter
a chord that passes through the center of a circle
secant
a line that intersects a circle at two points
point of tangency
a line that intersects the circle exactly one point
tangent segments from a common external point are
congruent
central angle
an angle whose vertex is the center of the circle
semicircle
arc with endpoints of a diameter
arc
unbroken part of the circle
minor arc
part of a circle measuring <180
^{ }
degrees
major acr
part of a circle measuring between 180 and 360 degrees
measure of a minor arc
named with two letters
measure of a major arc
named with three letters
congruent circles
two circles are congruent if they have the same radius
congruent arcs
two arcs are congruent arcs if thhey have the same measure and are acrcs of the same circle or of congruent circles
inscribed angle
an angle whose vertex is on a circle
intercepted arc
the arc that lies in the interior of an inscribed angle and has endpoints on the angle
inscribed polygon
a polygon whose vertices all lie on a circle
circumscribed circle
a circle that contains the vertices of an inscribed polygon
segment of a chord
when two chords intersect the interior of a circle , each chord is divided into two segments
secant segment
a segment that contains a chord of a circle and has exactly one endpoint outside the circle
external segment
the part of secant segment that's outside the circle
circumference
the distance around a circle
arc length
portion of the circumference of a circle
sector of a circle
the region bounded by two radiis of the circle and their intercepted arc
sphere
the set of all points in space equidistant from a given point
center of a sphere
the given point from which all points on the sphere are equidistant
radius of a sphere
a segment from the center to a point on the sphere
chord of a sphere
a sphere is a chord that contains the center of the sphere
great circle
the intersection of the sphere and a plane that contains the center of the sphere
hemisphere
one of the congruent halfs of a sphere
Author
Anonymous
ID
74541
Card Set
math terms
Description
math terms
Updated
2011-03-22T21:42:28Z
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