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17 Cards in this Set
- Front
- Back
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Undefined terms
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Undefined terms can not be defined by using other figures. The undefined terms point, line, and plane are the building blocks of geometry.
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Line
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A straight path that has no thickness and extends forever.
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Point
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Names a location and has no size it is represented by a dot.
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Plane
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Is a flat surface that has no thickness and extends forever.
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Collinear
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Points that lie on the same line.
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Coplaner
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Points that lie on the same plane
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Segment
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The part of a line consisting of two points and all points between them.
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End point
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A point at one end of a segment or the starting point of a ray.
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Ray
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A part of a line that starts at an endpoint and extends forever in one direction.
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Opposite rays
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Two rays that have a common endpoint and form a line.
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Postulate
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A statement that is accepted as true without proof.
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Circle
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A set of points in a plane that are equidistant from a given point in the plane known as the center of the circle.
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Radius
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A segment from the center of the circle to a point on the circle.
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Intersection
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An intersection is the set of all points that two or more figures have in common.
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Chord
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A segment whose end points lie on a circle.
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Diameter
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A chord that contains the center of a circle.
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Arc
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An unbroken part of a circle.
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