Jawaban:
a. (5a + 60) + 3a = 180°
8a + 60 = 180
8a = 180 - 60
8a = 120
a = 120 ÷ 8
a = 15
b. Sudut AOC = 5a + 60
= 5.15 + 60
= 75 + 60
= 135°
c Sudut BOC = 3a
= 3 x 15
= 45°
Penjelasan dengan langkah-langkah:
Mapel matematika
Kelas 7 SMP
Bab Sudut
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Jawaban:
a. (5a + 60) + 3a = 180°
8a + 60 = 180
8a = 180 - 60
8a = 120
a = 120 ÷ 8
a = 15
b. Sudut AOC = 5a + 60
= 5.15 + 60
= 75 + 60
= 135°
c Sudut BOC = 3a
= 3 x 15
= 45°
Penjelasan dengan langkah-langkah:
Mapel matematika
Kelas 7 SMP
Bab Sudut