Catherine needs to sell boxes of cookies as a fundraiser for a team. she starts with 135 boxes and begins selling at a constant rate of 15 boxes each day.

use the segment tool to plot a graph representing the number of boxes of cookies catherine has left to sell from the time she begins selling until the cookies are gone.

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.