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20 Cards in this Set

  • Front
  • Back
Midpoint
The point that divides a segment into two congruent segments
Supplementary Angles
Two angles whose measures have a sum of 180
Segment Bisector
A line that divides a segment into two congruent segments
Acute Angle
An angle whose measure is less than 90
Angle Bisector
A ray that divides an angle into two congruent angles
Linear Pair
the two angles formed by the endpoint of a ray when the endpoint falls on a line; tow adjacent angles whose noncommon sides are opposite rays; two supplementary angles that reside on a line
Right Angle
An angle with a measure of 90
Complementary angles
Two angles whose measure have a sum of 90
Perpendicular
Lines intercept to form right angles
Obtuse Angle
An angle whose meausure is greater than 90 and less than 180
Perpendicular Bisector
A line that is perpendicular to a segment at its midpoint
Coplanar
Lying in the same plane
Ray
A part of a line that starts at a point and extends infedentely in one direction
Endpoints
A point at the end of a segment or the starting of a ray
Postulate
A statement that is accepted true without proof
Concurrent Lines
litterally "running together; of three of more lines interacting at a single point
Segment
A part of a line that begins at one point and ends at another; a segment of a line has two endpoints
Congruent
The relationship between figures having the same size and shape; congruent segments are segments that match exactly
Undefined Terms
Point, Lines, and Plane; because they are so basic they are not defined by other figures
Vertex
A point where the edges of a figure intercect; plural - vertices