1. Created By : Brandon Towns

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3.  When two angles have the same measure, they are Congruent Angles Pg.2

4.  Vertical Angles are the angles opposite each other when two lines cross Pg. 3

5.  Two lines are perpendicular if the product of their slopes is -1. Also, the two intersecting lines form right angles. Pg.3

6.  Two or more lines that meet at a point are called intersecting lines. That point would be on each of these lines. In Figure 1, lines l and m intersect at Q.1 Pg.4

7.  Two Angles are Supplementary if they add up to 180 degrees. Pg.5

8.  The relation or adaptation of one portion to another, or to the whole, as respect magnitude, quantity, or degree; comparative relation; ratio; as, the proportion of the parts of a building, or of the body. Pg. 7

9.  A point can be imagined as an infinitely small dot, a line resembles a tough string that is being stretched.  A line is a straight line.

10.  Length is a measurement of distance or dimension.  A Segment is a portion cut off from a geometric figure by one or more points, lines, or planes

11.  A Ray is a line which starts at a point with given coordinates, and goes off in a particular direction to infinity, possibly through a second point.linepointcoordinates  A Postulate is a statement accepted as true without proof. A postulate should be so simple and direct that it seems to be unquestionably true.

12.  Two rays sharing a common endpoint. Angles are typically measured in degrees or radians.raysmeasured degreesradians  A Protractor is a circular or semicircular tool for measuring an angle or a circle.

13.  A Acute Angle is an angle that has measure less than 90°.angle measure  A Obtuse Angle is an angle that has measure more than 90° and less than 180°.angle

14.  A Right Angle is a 90 ° angle. angle  A Straight Angle is a 180° angle.angle

15.  Bisector is a line segment, line, or plane that divides a geometric figure into two congruent halves.line segmentlineplanegeometric figure congruent  Two acute angles that add up to 90°. For example, 40° and 50° are complementary.acute angles