Question 438441
Since EF=AB/2, then AB=2EF.

Area of ABCD=ABXBC and area of EFGH=EFXFG,since these two areas are equal we write:ABXBC=EFXFG, substitute on these equalities: AB=2EF and we get:

2EFXBC=EFXFG, divide both sides of equality by EF and get:

 2BC=FG, this relation is true, thus the first answer is true.