Ineed to this problem very difficult

1. j || k and angle 1 = angle 3. 1. Given

(Those are the givens, no surprise there.)

2. angle 1 = angle 2. 2. If the lines are ||, then corresponding angles are congruent

j and k are parallel, l transverse so 1 and 2 are congruent corresponding angles.

3. angle 2 = angle 3 3. Substitution

We substitute angle 2 in for angle 1 in the other equation. This might also be called the transitivity of equality.

4. l || m 4. If alternate interior angles ...

We have congruent alternate interior angles of a transversal, so parallel lines.

Answers: 2 1 4 3

step-by-step explanation: hi!

answer: the proof is mentioned below.

step-by-step explanation:

since, given:   lines bc = ef

prove:   lines ac > ef

          statements                                           reason

1. bc=ef                                           1. given

2. ac= ab+bc                                 2. because b is the point between the  

                                                            line segment ac

3.   ac > bc                                       3. because if a line segment is equal to

                                                          the sum of two line segments then it is

                                                          always greater then each of these

                                                          individual line segments

4. ac > ef                                         4. by equality property.