Vă rog mult!!!!!!!!!!

A+B = 180⁰
A-B = 50⁰50'50''
2·A = 180⁰+50⁰50'50''
2·A = 230⁰50'50''
A = 230⁰50'50'' :2
A = 115⁰25'25''
B = 180⁰-115⁰25'25'' = 179⁰59'60''-115⁰25'25'' = 64⁰34'35''
B = 64⁰34'35''