The stretch of a spring varies directly to the weight attached to it. A 45 pound weight stretches the spring 2.5 inches.
Which of the following is the correct weight it would take to
stretch the spring 7 inches?
A. 17.5 lbs.
B. 112.5 lbs.
C. 126.0 lbs.
D. 315.0 lbs

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.