Question

Tr Dr cateta 1 =12 cm ip=20 sa se afla măsura catetei doi




Dau 20 puncte

Answer 1

ABC tr. dreptunghic
AC=12cm
BC=20cm
——————-
AB?

T.P.=>C1*2+C2*2=ip*2
AB*2+AC*2=BC*2
AB*2+12*2=20*2
AB*2+144=400
AB*2=400-144
AB*2=256
AB=radical din 256
AB=16cm

Sper că te-am ajutat !

Answer 2

$\it c_2=\sqrt{20^2-12^2}=\sqrt{(20-12)(20+12)}=\sqrt{8\cdot32}=\sqrt{8\cdot8\cdot4}=8\cdot2=16$

sau: (12,  16,  20) - triplet pitagoreic