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18 Cards in this Set

  • Front
  • Back
A set of points that extends indefinitely in oppsite directions
Acute Angle
Less than 90 degree
Obtuse Angel
More than 90 degree and
less than 180 degree
Line Segment
A part of a line consisting of two end points and all the points between them.
A part of a line that has one denpoint and extends indefinitely in one direction
Parallel Lines
Two lines on the same plane that do not intersect.
Intersecting lines
Two lines in the same plane that meet at a point.
A figure formed by two rays and a common endpoint, the vertex
A point where the sides of an angle meet.
Acute angle
An angle with a measure between 0 and 90 degree
<0 and 90>
Obtuse angle
An angel with a measure between 90 and 180 degree
Right angle
An angle with a measure of exactly 90 degree
Straight angle
An angle with a measure of exactly 180 degree (Line)
Adjacent angle
Two angles that share a vertex and a common side
Vertical angles
Opposite angles formed by two intersecting lines. Their measures are the same
Complementary Angles
Two angles whose measures have a sum 90 degree
Supplementary Angles
Two angles whose measures have a sum of 180 degree
Perpendicular Lines
Two lines that intersect and form 90 degree angles at their intersection.