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Verified answer
7)180° = 90° + 2x + 3x
180° = 90° + 5x
180 - 90° = 5x
90° = 5x
90/5 = x
18 = x
x = 18
Maka,
a) Nilai x = 18°
b) < BAC = 2x = 2.18° = 36°
c) < BCA = sudut siku-siku = 90°
8)
Sebelumnya ingat pernyataan ini dulu :
SUDUT PUSAT BESARNYA DUA KALI SUDUT KELILING APABILA MENGHADAP BUSUR YANG SAMA
Jadi,
Nilai y adalah
= 30° : 2
= 15°
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