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Stack #31052

Ray a straight line extending on in one direction forever
Line segment o portion of a line that has two end points.
Line a line that gose on forever in both directions
Parallel Lines two lines on the same plane that will never intersect
congruent segments angles with the same measures
Perpendicular two lines intersecting to form a right angle
plane a flat surface that extends forever
collinear points that lie on the same line
coplanar points and lines that lie on the same plane
intersection lines lines that meet at a point
Angle The figure formed by two lines diverging from a common point.
vertex The point at which the sides of an angle intersect
acute angle an angle less then 90°
straight angle an angle of 180°
obtuse angle an angle less then 180° but greater than 90°
complementary angles the sum of two angles put together is 90°
congruent angles angles with the smae measures
vertical angles Either of two angles formed by two intersecting lines and lying on opposite sides of the point of intersection.
Adjacent angles complementary angles share a common side and vertex. the sum of the two angles measures is 90°
tranaversal A line that intersects a system of other lines.
Created by: x30oColleen