Buna,
daca m(AMC)=m(MCD)=60, de unde imi da m(AMB)=120...
vad in barem si nu inteleg....
![Buna Daca MAMCmMCD60 De Unde Imi Da MAMB120vad In Barem Si Nu Inteleg class=](https://ro-static.z-dn.net/files/dd3/6bdd8694c4fbd3fe3229315313e1a1a5.jpg)