Geometry Proof Review by alicejenny

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									                                   Geometry Cheat Sheet!

Segment Bisector  2  segments

Angle Bisector  2  angles

Midpoint  2  segments

Vertical Angles   angles

Complementary Angles  sum of 90 degrees

Supplementary Angles  sum of 180 degrees

Linear Pair  2 supplementary angles

Isosceles triangle  2  legs

Isosceles triangle  2  base angles

Perpendicular Lines  right angles

Right angles   angles

Parallel Lines   alternate interior angles (corresponding angles, etc.)

Median  midpoint

Altitude  perpendicular

Addition Postulate
1. AB  DE , BC  EF            1. Given
2. AB  BC  DE  EF            2. Addition Postulate
    AC  DF                                                        A        B   C

Subtraction Postulate
1. AC  DF , AB  DE            1. Given                           D        E   F
2. AC  AB  DF  DE            2. Subtraction Postulate
    BC  EF

								
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