Perhatikan gambar berikut! Besar ZBAC adalah... C 75° 3x-7 A 42° 85° 68° 60° X + 12 * B 5 poin
Penjelasan dengan langkah-langkah:
75 + 3x - 7 + x + 12 = 180°
4x + 80 = 180
4x = 180 - 80
4x = 100
x = 100/4
x = 25°
__
= ∠BAC
= 3x - 7
= 3.25 - 7
= 75 - 7
= 68°
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