AB= 10
semi= 25pi/2= 39,2699081698724
BFHA= 2*semi= 78,5398163397448
Fy= 10

Tx= cos(x)*5
Ty= 5-sin(x)*5
m= Tx/(5-Ty)
n= Ty -m*Tx
Fx= (10-n)/m
Hx= -n/m
BFHA2= (Fx+Hx)*10/2

ABS(BFHA2-25*pi) = 0

X°= 50,4597762521898°

Tx= 3,18309886183791
Ty= 1,14411078533547
m= 0,825516161027683
n= -1,48358876726054
Fx= 13,9107982488976
Hx= 1,79716501905139
BFHA2= 78,5398163397448

Ox= 0
Oy= 5
Ex= 23,9107982488976
Ey= 10
Gx= 18,9107982488976
Gy= 5

OT= 5
OE= 24,4279813513005
TG= 16,1934681166662
GE= 7,07106781186548
TE= 22,540281623412

TOE= 54,0564416955666
TEG= 29,6795254309878

Area= TOE+TEG= 83,7359671265544 cm^2