name the def, property, postulate, or theorem

Question

if line AB is congruent to line CD, then AB+EF=CD+EF

If line AB is congruent to line XY then XY is congruent to AB

if x(y+z)=a, then xy+xz=a

if two angles are vertical then they are congruent

if angle 1 and angle 2 are right angles then angle 1 is congruent to angle 2

Answer 1

These are properties that you should find in your book. You just need to match them up. Look in your textbook for things like the Addition Property of Equality, the Symmetric Property of Congruence and so forth. Then just match them up.