teorema catetei BC
BC^2=BE x AB
BE=144/20=36/5=7,2 cm
AE=AB-BE=64/5=12,8 cm
teorema catetei AC
AC^2=AE x AB=256
AC=BD=16 cm
CD=AB-2BE=20-72/5=28/5=5,6 cm
perimetrul trapezululi
P=AB+2BC+CD=20+24+28/5
P=248/5=49,6 cm
pitagora in BEC, CE=√(BC^2-BE^2)=√(144-1296/25)
CE=48/5=9,6 cm
din asemanarea triunghiurilor NOC si AOM avem:
NO/OM=NC/AM=14/50
NO+OM=CE=48/5
OM=15/2=7,5 cm
ON=21/10=2,1 cm