Top 10.938

X = ACM = 21

X = CAD = 15

Red Area - Yellow Area = 24

𝛼 = DAE = β = DBE = 30

Circle in Semicircle ( Elaborated )

tangent of θ = LM / BL = 1 / 3

X = AG = 21 / 4 = 5.25

Y / X = 1.74897690899

X = 135 / 2 = 67.5

Yellow Area = 13.8461538462