Question

e un triunghii dreptunghic cu o cateta de lungime egala cu 20 cm si ipoten uza de lungime egala cu 29 cm .sa se calculeze lungimea celeilalte catete.

Answer 1

$c_{2} ^{2} = 29^{2} - 20^{2} =(29-20)(29+20)=9\cdot49= (3\cdot 7)^{2} = 21^{2} \\ c_{2}=21$

Answer 2

c²+c²=i²
c²+20²=29²
c²+400=841
c²=841-400
c²=441
c=√441
c=21 cm