Top 10.650

Blue Area = 15 / 4 = 3.75

Shaded Fraction = 1 / 3

Missing Angle BCD = 40°

Chord AB = 1

Square Area = 144

Red Area = 4.87689437438

X = CD = 28 / 5 = 5.6

Blue Area = 12.087520559

Animated: Blue in Terms of R and BAC

Blue Area = 14.8492424049

Blue Area = 45 / 4 = 11.25

Simplified / Improved