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Basic Geometry Definitions
Terms in this set (44)
Any line segment with endpoints on a circle
Planes that do not intersect.
A subset of a line that contains two points of the line and all points between them.
A measuring device used to measure an angle.
An angle that measures greater than 90° and less than 180°.
Lines that are in the same plane.
The union of two rays that share an endpoint.
A chord that contains the center of a circle.
A segment without its endpoints.
Planes that have a single line in common.
A unit of angle measure equal to 1/60 of a degree.
An angle that measures more than 180° but less than 360°.
The set of all points in a plane that are the same distance from a given point.
A statement that cannot be proven.
Two distinct coplanar lines that have no point in common.
A straight path connecting two distinct points and extending infinitely beyond those two points.
Any part of a circle that can be drawn without lifting a pencil.
Interior of an Angle
The region in the plane between two sides of a non-straight angle.
noncoplanar lines, neither parallel nor intersecting
Angles that share a common vertex and a common side, but their interiors do not overlap.
An arc determined by a central angle whose measure is less than 180°.
A segment without one endpoint.
Two intersecting lines that form right angles.
Two angles whose measures add up to 180°.
A subset of a line starting at a point and extending infinitely in one direction.
An arc determined by a diameter.
A unit of angle measure equal to 1/360 of a complete revolution.
An angle that measures 180°.
The longer of the two arcs determined by two points on a circle.
Points that lie on the same line.
A unit of angle measure equal to 1/3600 of a degree.
The shared endpoint of two rays that make up an angle.
An angle that measures less than 90°.
The angle between two planes.
Two angles whose measures add up to 90°.
A flat surface uniquely determined by three noncollinear points.
Lines (usually more than two) that intersect in the same point.
An angle in a circle with its vertex at the circle's center.
An angle that measures 90°.
Two rays with a common endpoint that point in opposite directions and form a straight line.
Coplanar lines with exactly one point in common.
Statements that can be proven.
A line segment between a circle's center and any point on the circle.
A line segment that includes its endpoints.
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