Penjelasan dengan langkah-langkah:
1. x = 180 - 38
x = 142°
2. y = 180 - 132
y = 48°
5. 3a + 2a = 180°
5a = 180°
a = 180/5
a = 36°
7.
4a + 3a +2a = 180
9a = 180
a = 180/9
a = 20°
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Penjelasan dengan langkah-langkah:
1. x = 180 - 38
x = 142°
2. y = 180 - 132
y = 48°
5. 3a + 2a = 180°
5a = 180°
a = 180/5
a = 36°
7.
4a + 3a +2a = 180
9a = 180
a = 180/9
a = 20°