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Geom q4 (1.15-1.17)

circle a closed curve in a plane all of whose points are equally distant from a fixed point in the plane called the center
circumference the perimeter of a circle
semi-circumference one half the length of the circumference
diameter a line through the center with its ends on the circle
radius a line joining the center with any point on the circle
chord any straight line whose ends are on the circle
arc any portion of a circle
semicircle arc which is half of a circle
quadrant arc which represents a quarter of a circle
congruent when two plane figures have the same size and shape and can be made to coincide
corresponding or homologous angles and sides that would match in superposition
equal, congruent 2 interchangeable words for the same
Created by: tatianaprince