Top 10.445

Yellow / Blue = 5 / 12

cos ABC = -23 / 25

Red R / Green R = 2 & 3

Angle CKM = 45°

BC = Diameter of Semicircle

Yellow = 1 ⇒ Total = 162

Another Approach

Shaded Area = 16 Square Units

Blue Area = 32.4759526419

Minimum = 1.61803398875

Fraction = 0.441786466911

Another Approach