What can you conclude about the interior angles formed when two parallel lines are cut by a transversal?

Alternate interior angles are congruent; same-side interior angles are supplementary.

Step-by-step explanation:

When two parallel lines are cut by a transversal, the interior angles will be the angles between the two parallel lines.  Alternate interior angles will be on opposite sides of the transversal; the measures of these angles are the same.

Same-side interior angles will be on the same side of the transversal; the measures of these angles will be supplementary, adding up to 180 degrees.

it would open into a square depending on the type of envelope i’m not sure about the second part