tolong dijawab ya, thanks
Penjelasan dengan langkah-langkah:
17. 360 - 240 = 120°
120° = 2x + 8
112° = 2x
112° : 2 = x
56° = x
56 / 2 = 28° (B) ??? —not pretty sure
18. x = 3a - 8
x + a = 180
x = 180 - a
180 - a = 3a - 8
188 = 4a
47 = a
x = 3.47 - 8
= 141 - 8 = 133 (D)
19. Sudut penyiku 73° >>> 90° - 73° = 17° (C)
20. 2x + 4x = 90°
6x = 90°
x = 15° (B)
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