`Garis dan sudut
3a + 2a + a = 180°(krn berpelurus)
5a + a = 180°
6a = 180°
a = 180°/6
a = 30°(Opsi kedua)
3a + 2a + a = 180°
(3 + 2 + 1)a = 180°
a = 30°
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`Garis dan sudut
3a + 2a + a = 180°(krn berpelurus)
5a + a = 180°
6a = 180°
a = 180°/6
a = 30°(Opsi kedua)
3a + 2a + a = 180°
(3 + 2 + 1)a = 180°
6a = 180°
a = 180°/6
a = 30°