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# Geometry definitions

TermDefinition
circle the set of all points in a plane equal distance from a given point
secant a segment that intersects a circle in 2 points with a point as an endpoint of a segment
central angle an angle whose vertex is the center of the polygon and whose side contains 2 consecutive verticies
Tangent line that intersects a circle in exactly 1 point
point of tangency a point where the line touches the circle
radius distance from the center to a point on the circle
congruent circles 2 circles that have same radius
Major arc > 180
Minor arc < 180
sector a region bounded by 2 radius of a circle and intercepted arc
semicircle 180
arc length circumferance of a circle
apothom distance from center of polygon to any side
diameter a chord that goes through the center of a circle
chord segments whose end points ar on the circle
area of a rectangle A= LW
obtuse triangle all angles > 90
acute triangle all angles < 90
median a segment whose end points are a vertex of a triangle and mid points of opposite side
scale factor the ratios of the lengths of 2 corresponding sides of 2 polygons
midsegment theorem a segment that connects the mid points of the legs of a trapazoid
proportion
Created by: dml2nc