Geometry A Unit 6 Flashcards
Center of an Arc
The center of the circle that contains the arc.
Center of a circle
The point in the plane equidistant from all points of the circle.
Central angle
An angle with its vertex at the center of a circle.
chord
A segment with end points on the circle.
circle
The set of all points in a plane that are at a given distance from a given point in the plane.
circumscribed polygom
A polygon with each side tangent to the circle contained within.
common external tangent
A tangent to two coplanar circles such that a segment connecting the centers of the circles does not intersect the tangent.
common internal tangent
tangent to two coplanar circles such that a segment connecting the centers of the circles intersects the tangent.
concentric angles
Two or more circles that lie in the same plane and have the same center.
congruent circles
Circles that have equal radii.
diameter
A chord of a circle that contains the center of the circle.
inscribed angle
The intersection of a sphere and a plane that passes through the center of the sphere.
inscribed angle
An angle with vertex that is a point of an arc other than the end points and with sides that pass through the end points of the arc.
intercepted arc
The arc with end points that are points of the sides of the angle and including all points on the arc in the interior of the angle.
major arc
The union of two points of a circle, not the end points of a diameter; and all points of the circle that lie in the exterior of the central angle with sides that contain the two points.
