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Has a specific location, no size
Straight, continuous arrangement of infinitely many points
Has infinite length and width, but no thickness
A point at the end of a segment or ray
On the same line
On the same plane
Point on the segment that is the same distance from both endpoints
Two lines that intersect at a 90 degree angle
Two lines that are coplanar and never intersect (or two lines that are always the same distance apart)
Formed by two rays that share a common endpoint, provided that the two rays are noncollinear
The common endpoint of the two rays of an angle
The two rays of an angle
A line that contains the vertex of an angle and splits the angle into two congruent angles
Dividing the segment into congruent segments
Consists of two points called the endpoints of the segment and all the points in between them that are collinear with the two points.
An angle that measures 90 degrees
An angle that measures 180 degrees
Two segments that have the same measure and length
An angle that measures less than 90 degrees
Two angles that have the same measure.
Measures more than 90 degree but less than 180 degrees
A closed figure in a plane that has no intersecting sides
A line connecting nonconsecutive vertices
A polygon with no diagonals outside of the polygon
A polygon that has at least one diagonal outside of the polygon
A polygon that is exactly the same size and shape as another polygon
A polygon with congruent sides
A polygon with congruent angles
A polygon with congruent sides and angles
A polygon with three sides
A triangle with a right angle
A triangle with no congruent sides
A triangle with three congruent sides
A triangle with at least two congruent sides
A polygon with four sides
A quadrilateral with exactly one pair of parallel sides
A quadrilateral with two distinct pairs of congruent, consecutive sides
A quadrilateral with two pairs of parallel sides
A parallelogram with congruent sides
A parallelogram with four congruent angles
A regular quadrilateral or an equilateral rectangle, or an equiangular rhombus
The set of all points on a plane equidistance from a point
A line segment from the center point of a circle to the edge of a circle
A line segment whose endpoints lie on the circle
A chord that passes through the center
A line that intersects the circle only once
Circles that share the same center
A diagram that uses circles to represent sets and their relationships
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Chapter One Discovering Geometry Definitions.doc
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