besar BOC adalah....°
Jawaban:
BOC = 66°
Penjelasan dengan langkah-langkah:
1. Cari nilai a
AOB + BOC = besar sudut siku-siku
2a + 4a + 18 = 90°
6a + 18 = 90°
6a = 90 - 18
6a = 72
a = 72/6
a = 12
2. Cari besar sudut BOC
BOC = 4a + 18
BOC = 4(12) + 18
BOC = 48 + 18
BOC = 66°
