supplementary
A+
congruent supplements
converse of the isosceles triangle theorem
(1) transitive, (2) reflexive
congruent
I'm happy to help! Please provide the paragraph or the statement you would like me to complete.
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