Top 10.399

Angle DFO = 45°

Blue Area = 6.54498469498

m = 30 ⇒ n = DE = 11

Missing Angle BDC = 96°

X = BE = 1.25992104989

Blue Area = 4.583592135

Center of incircle: M ( 0.375 ; 0.375 )

Missing Angle BDT = 60°

Blue Area = 10.522340181

Another Approach

Semicircle in Semicircle (With Ellipse)