Question

Match the reasons with the statements in the proof to prove DF = EF given that DEF is a triangle by definition and angles 3 and 4 are equal.

Answer 1

Statement 1 is already given

Statement 3 is using the fact that angles 3 and 4 are equal, plus he fact that angles 1 and 2 are supplementary to angles 3 and 4, which, as we stated before, are equal

Statement 4 is making a conclusion about those two sides based on statement 3

Statement 2 gets the reason that hasn’t been used yet

See what you can derive from this