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# Chp 10 Vocab

TermDefinition
Circle is the locus or set of all points
Center a given point in a circle which all other points are equidistant
radius is a segment with endpoints at the center and on the circle
chord a segment with endpoints on the circle
diameter of a circle is a chord that passes through the center and is made up of collinear radii
Congruent circles two circles that are the congruent if and only they have the same radius
concentric circles are coplanar circles that have the same center
circumference of a circle is the distance around the circle
pi ratio c over d as an irrational number
inscribed in a circle if all of a polygons vertices lie on the circle
circumscribed a circle is circumscribed about a polygon if it contains all the vertices of the polygon
central angle of a circle is an angle with a vertex in the center of the circle
arc is a portion of a circle defined by two endpoints
minor arc is the shortest arc connecting two endpoints on a circle
major arc is the longest arc connecting two endpoints on a circle
semi circle is an arc with endpoints that lie on a diameter
congruent arcs are arcs in the same or congruent circles that have the same measure
Adjacent arcs are arcs in a circle that have exactly one point in common
arc lenght is the distance between the endpoints along an arc measured in linear units
inscribed angle has a vertex on a circle and and sides that contain chords of the circle
intercepted arc has endpoints on the sides of an inscribed angle and lies in the interior of the inscribed angle
Tangent is a line in the same plane as a circle that intersects the circle at one point
point of tangency the point that the tangent intersects
common tangent is a line, ray, or segment that is a tangent to two circles in the same plane
secant is a line that intersects at two points
chord segments when two chords intersect inside a circle each chord is divided into two pieces
secant segment is a segment of secant line that has exactly one end point on the circle
external secant segment a secant segment lies in the exterior of the circle
tangent segment segement of a tangent with one end point on the circle
compound locus satisfies more than one distinct set of conditions
Created by: BB2424