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Geo_5.1

Vocabulary for Geometry_5.1

TermDefinition
adjacent arcs Arcs in a circle that have exactly one point in common.
arc A part of a circle that is defined by two endpoints. The measure of an arc is given in degrees.
arc length The distance between the endpoints along an arc measured in linear units.
center (of circle) The central point where radii form a locus of points called a circle.
central angle An angle that intersects a circle in two points and has its vertex at the center of the circle.
chord For a given circle, a segment with endpoints that are on the circle.
circle The locus of all points in a plane equidistant from a given point called the center of a circle.
circumference The distance around a circle.
circumscribed A circle circumscribed about a polygon if the circle contains all the vertices of the polygon.
concentric circles Coplanar circles with the same center.
congruent arcs Arcs in the same circle or in congruent circles that have the same measure.
diameter In a circle, a chord that passes through the center of the circle.
inscribed A polygon is inscribed in a circle if each of its vertices lie on a circle.
major arc An arc with a measure greater than 180.
minor arc An arc with a measure less than 180.
pi (π) An irrational number represented by the ratio of the circumference of a circle to the diameter of the circle.
radius In a circle, any segment with endpoints that are the center of the circle and a point on the circle.
semicircle An arc that measures 180.