interior of a circle - set of all points inside the circle
exterior of a circle - set of all points outside the circle
chord - a segment whose endpoints lie on the circle
secant - a line the intersects a circle at two points
tangent - a line in the same plane as a circle that intesects it at exactly on point
point of tangency - the point where the tangent and a circle intersect
concentric circles - coplanar circles with the same center
tangent circles - two coplanar circles that intersect at one point
radius - midpoint of a circle
diameter - a line that goes strait through the middle of the circle
minor arc - an arc whose points are on or in the interior of a central angle
major arc - and arc whose points are on o on the exterior of a central angle
semicircle - half of the circle
sector of a circle - a region bounded by two radii of the circle and their intersepted arc
How to find the area of a sector.
A = 3.14 (pi)r2(m/360 degrees)
arc length - the distance along an arc measured in linear units
Inscribed angles of a circle --->
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