a ) Se aplica T. Pitagora
suma patratelor catetelor = patratul ipotenuzei
3 patrat + 4 patrat = ipotenuza patrat
9 + 16 = ipotenuza patrat
ipotenuza = rad 25 = 5
b ) ip. patrat = 6 patrat + 8 patrat
ip. = rad 100 =10
c) ip. patrat = 15 patrat + 20 patrat
ip. = rad 625 = 25
d ) ip. patrat = 3 patrat + (3rad3 )patrat
ip. = rad 36 = 6