(1) symmetric, (2) vertical angles
angle addition postulate
(1) vertical angles, (2) side- angle -side
(1) symmetric, (2) side- side- side
(1) a congruent, (2) side- angle- side congruence
(1) symmetric, (2) side- angle- side
(1) corresponding angles, (2) angle- angle- side
(1) QUN ~ EUS, (2) EUS ~TIS, (3) TIS~ OIN
right triangles (3)HL
(2) HY~ YH
supplementary
A+
congruent supplements
converse of the isosceles triangle theorem
Side-Side-Side Congruence Postulate
(1) transitive, (2) reflexive
congruent
A+
definition of perpendicular lines
transitive property of congruence
A proof written in the form of a paragraph (as opposed to a two-column proof)
congruent complements