nsaurel nsaurel 21-11-2022 Mathematics contestada Isosceles trapezoid ABCD is shown with midsegment EF. If base BC = 17x, base AD = 30x + 12, and EF = 22.5x + 9, what is BC? Isosceles trapezoid A B C D is drawn with parallel bases A D and B C and midsegment E F. 34 51 68 85