## Unit 6 Geometry Set 1

##### Created by:

mulroyb  on March 25, 2011

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# Unit 6 Geometry Set 1

 :Pointa dot that represents a location in space
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#### Definitions

:Point a dot that represents a location in space
Line a straight path of points that extends forever in opposite directions
Plane a flat surface that extends forever in all directions
Ray part of a line that has one endpoint and extends forever in one direction
Line segment part of a line with 2 endpoints
Congruent having the same measures
Angle two rays that begin at the same point and go in different directions
Vertex the point at the corner of an angle
Measure of an angle number of degrees in an angle
Congruent angles angles that have the same measure
Acute angle an angle measuring less than 90 degrees
Right angle an angle measuring exactly 90 degrees
Obtuse angle an angle measuring greater than 90 degrees but less than 180 degrees
Straight angle an angle measuring exactly 180 degrees
Perpendicular lines two lines that intersect at 90 degree angles
Parallel lines two lines that lie in the same plane but never meet
Transversal a line that intersects two or more lines in a plane at different points
Vertical angles two angles that are NOT adjacent and whose sides are formed by intersecting lines
Adjacent angles two angles with a common vertex and side but no common interior points
Corresponding angles angles formed by two parallel lines intersected by a transversal
Consecutive angles angles on the same side of the transversal
Alternate angles angles on different sides of the transversal
Interior angles angles inside of the lines
Exterior angles angles outside of the line
Consecutive interior angles angles that are on the same side of the transversal and inside the two lines
Alternate exterior angles Angles that lay outside the parallel lines and are on opposite sides of the transversal
Alternate interior angles Angles that lie within a pair of lines and on opposite side of a transversal
Complementary angles adjacent angles whose sum is 90 degrees
Linear pair a pair of adjacent angles whose uncommon sides are on opposite rays
Supplementary angles adjacent angles whose sum is 180 degrees

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