The Doge

Def. of Congruence

• $m\angle A=m\angle B\leftrightarrow\angle A\cong\angle B$

• $m\angle R=m\angle S\leftrightarrow m\angle R\cong\angle S$

Angle Bisector

• Divides an angle into two equal parts.

• Divides an angle into 3 equal parts.

Complementary Angles

• Sum equals 90

• Sum equals 180

Supplementary Angle

• All of the Angles equal 180

• All of the Angles equal 360

Def. of Perpendicular

• Form right angles

• For obtuse angles.

Def. of Right Angle

• Forms a 90 degree angle

• Forms a 180 degree angle

Angle Addition Postulate

• $\angle ABD+\angle DBC=\angle ABC$

• $\angle GTO+\angle OTP=\angle GTP$

Vertical Angle Theorem

• Two angles are congruent

• Two angles are perpendicular

Complement Theorem

• When two angles equal 90 degrees

• When two angles equal 180 degrees

Supplement

• When two angles equal 90 degrees

• When two angles equal 180 degrees