Top 10.867

X = ∠ FEG = 48

Area ( △ ABC ) = 84 Square Units

Segment EF = 10

h = 1.41421356237

X = ∠ CED = 40

X = BCD = 75

Another Approach

Blue Area = 29.2762519061

Triangle CDE Area = 5

X = AB = 4

BCM = ACM = 22.5