tolong dijawab ya, jgn ngawur
Penjelasan dengan langkah-langkah:
GARIS dan SUDUT
8. C
5x + 4x + 9 = 180
9x = 180 – 9
9x = 171
x = 171/9
x = 19
pelurus SQR = 5x
= 5 × 19
= 95°
9. C
sudut 3 = 110° – 95°
sudut 3 = 25°
10. A
sudut BCA = 112° – 42°
sudut BCA = 70°
11. C
sudut A2 dan B3 sepihak
12. C
4x - 6 + 39 + 3x = 180°
7x = 180 - 33
x = 147/7
x = 21
sudut B = 4 × 21 – 6
sudut B = 84 – 6
sudut B = 78°
13. C
∅ = 50° + 180° – 150°
∅ = 80°
14. C
sudut A3 bertolak belakang dengan A1
A3 = A1 = 7 × 180°/(7+3)
A3 = A1 = 7 × 180°/10
A3 = A1 = 7 × 18°
A3 = A1 = 126°
15. B
x = 180 – (85 + 35)
x = 180 – 120
x = 60°
16. C
garis h + garis g = 180°
60° + 120° = 180°
garisnya sejajar
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