Explicație pas cu pas:
a. a²=b²+c²
b. NP²=MN²+MP²
MN²=NP²-MP²
MP²=NP²-MN²
c. m(Â)=90°=>BD²=AB²+AD²
m(č)=90°=>,CD²=BD²-CB²
d. m(M)=90°=>AM²=AC²-CM²
m(M)=90°=>AB²=AM²-BM²
