pliss dijawab sekarang ya....

1.) 2a + 3a = 90°
5a = 90°
a = 90°/5
a = 18°
jadi, a = 18°

2.) (a + 29°) + 46° + 5a + 15 = 180°
29a° + 46° + 5a + 15 = 180°
75a + 20a = 180°
95a = 180°
a = 180°/95
a = 1,85


*maaf kalo salah yaaa..
#semogamembantu