Segment and Angle Proofs

Front

Back

Reflexive Property of Congruence

Front

If ∠ABC≅∠DEF, then ∠DEF≅∠ABC

Back

Symmetric Property of Congruence

Front

Or, if ∠ABC≅∠DEF∠ABC≅∠DEF and ∠DEF≅∠GHI∠DEF≅∠GHI, then ∠ABC≅∠GHI

Back

Transitive Property of Congruence

Front

Segments or Angles are congurent if and only if they have the same measure.

Back

Definition of Congruence

Front

If M is the mispoint of segment AB,

then AM = MB

Back

Definition of Midpoint

Front

If A,B and C are collinear points and B is between A and C, then AB + BC =AC

Back

Segment Addition Postulate

Front

An angle measure 90 degrees,

if an only if, it is a right angle.

Back

Definition of a Right Angle

Front

Two angles are complementary, if and only if the sum of their measures in 90 degrees.

Back

Definition of Complementary Angles

Front

Two angles are supplementary if and only ifthe sum of their measures is 180 degrees.

Back

Definition of Supplementary

Front

An angle divides an angle into to equal parts.

Back

Definition of Angle Bisector