Geometry Chapter 9 Section 1 Circles
Circle The set of all points in a plane that are a given distance from a center point Radius a line segment from the center point to the edge (on the) of a circle Diameter A line segment that has both endpoints on the circle and passes throough the center point
Circle Center Point radius Diameter
Circle Chord: a line segment with both endpoints on the circle Circumference: distance around the circle the ratio of the circumference to the diameter of a circle
All Radii are congruent W E G F J
Exact Circumference the circumference measured in terms of π If D = 12 then C = 12π If r = 8 then C = 16π
Name a Circle with it’s Center Point G Circle G
Name The circle 2 chords 2 radii a diameter W E G F J
Given Circle W Name If WF = 5 Find the measure of FG W E G F J
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