Respostas

2014-02-22T18:55:19-03:00
A + b = 90°
a = 3b - 16°

3b - 16° + b = 90°
4b = 90° + 16°
b = 106°/4
b = 26,5°  (multiplicamos 0,5 . 60' = 30'), então temos:
b = 26°30'
a = 90° - 26°30'                            onde      89° 60" (90°)           
                                                        b =    - 26° 30'     
                                                        a =      63°30'