Top 10.900

X = 0.277350098113

X = 0.270598050073

Green Triangle Area = 39

X = Angle ECM = 70

Area ( Trapezoid CDGF ) = 66

X = BC = 2.44948974278

Shaded Area = 2.73941302549

Proof that a = 2 b

Area ( Triangle ) = 147

X = BC = 9 / 2 = 4.5