Given ∠9≅∠13.which lines, if any, must be parallel based on the given information? justify your conclusion. c∥d, converse of the same-side interior angles theorema∥b, converse of the alternate interior angles theoremc∥d, converse of the corresponding angles theoremnot enough information to make a conclusion

<9 and <13 are corresponding angles according to the corresponding angles postulate. The converse of the corresponding angles postulate is simply the reverse of the corresponding angles postulate.

So, the answer would be c||d, converse of the corresponding angles theorem.

Just FYI, it's the corresponding angles postulate.

Happy Solving!