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chapter 10: circles
the set of all points in a plane that are equidistant form a given point
a segment whose endpoints are the center of the circle and a point on the circle
a segment whose endpoints are both on the circle and passes through the center
a segment whose endpoints are both on the circle
a line that intersects the circle in two points
a line that intersects the circle in one point that is coplanar
have the same center and are coplanar
tangent lines to more than one circle in one plane
a tangent line is perpendicular to the radius at the point of tangency
in a plane, if a line is perpendicular to a radius at its endpoint on the circle then the line is tangent to the circle
tangent segments are congruent