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heeeelp dau coroana​

Heeeelp Dau Coroana class=

Răspuns :

Răspuns:

a+b=90°

a=2b-4°12'

2b-4°12'+b=90°

3b=90°+4°12'

b=(90°+4°12')/3

b=94°12':3

b=31°24'

a=89°60'-31°24'

a=58°36'