26. Perhatikan gambar ! 3 2 4/1 A 3/2 4/1 B A₂ = (2x + 10)° dan B₂ = (x + 35)⁰, Jika maka besar A, adalah .... A. 60⁰ B. 75⁰ C. 100⁰ D. 120⁰
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A2 = B2 = sehadap
2x + 10 = x + 35
2x - x = 35 - 10
x = 25°
A2 = x + 35
A2 = 25 + 35
A2 = 60°
A1 + A2 = 180° ( sepihak )
A1 + 60 = 180
A1 = 180 - 60
A1 = 120°
Jawaban:
D
Penjelasan dengan langkah-langkah:
A2 = B2 → sehadap
2x + 10 = x + 35
2x – x = – 10 + 35
x = 25°
A2 = 2(25) + 10
A2 = 50 + 10
A2 = 60°
A1 + A2 = 180° → sepihak
A1 = 180° – A2
A1 = 180° – 60°
