tgB=cat.opusa/cat.alaturata=1/2=>cateta,alat.=2xcateta,opusa
notam,cu,x,o,cateta,si,stim,ca,cealalta,este,2x
Scriem,t.Pit.
x²+4x²=169
5x²=169
x²=169/5=>x=13/√5=13√5/5
Cealalta,cateta,este,26√5/5
Perim=26√5/5+13√5/5+13
Aducem,la,numitor,comun
P=26√5+13√5+65=39√5+65