Top 10.239

Perimeter = 5.2360679775

Line Segment BC = S = 28

Angle BDE = 30°

Angle ACD = X = 10°

Angle CAD = X = 24°

Shaded Area = 65

Orange Rectangle = 25

tan α / tan β = − 1 / 3

Green / Mauve = 5 / 6 = 0.833333333333

a / b = √ 3 or a / b = 1 / √ 3