Răspuns :
ip^2=20^2+15^2
ip^2=400+225
ip^2=625
ip= radical 625
ip=25
unde ip= ipotenuza
^2 inseamna la puterea a doua
ip^2=400+225
ip^2=625
ip= radical 625
ip=25
unde ip= ipotenuza
^2 inseamna la puterea a doua