→ y + 16° = 90° - x
→ y + 16° = 90° - 37°
→ y = 53° - 16°
→ y = 37° (C.)
–
→ 3a - 20° + 2a = 180°
→ 3a + 2a = 180° + 20°
→ 5a = 200°
→ a = 40°
→ Sudut AOC
→ 3a - 20°
→ 3(40°) - 20°
→ 120° - 20°
→ 100° (C.)
→ 3p = 132°
→ p = 132°/3
→ p = 44°
→ 4q = 180° - 132°
→ 4q = 48°
→ q = 12°
→ p + q
→ 44° + 12°
→ 56° (D.)
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No. 21
→ y + 16° = 90° - x
→ y + 16° = 90° - 37°
→ y = 53° - 16°
→ y = 37° (C.)
–
No. 22
→ 3a - 20° + 2a = 180°
→ 3a + 2a = 180° + 20°
→ 5a = 200°
→ a = 40°
→ Sudut AOC
→ 3a - 20°
→ 3(40°) - 20°
→ 120° - 20°
→ 100° (C.)
–
No. 23
→ 3p = 132°
→ p = 132°/3
→ p = 44°
→ 4q = 180° - 132°
→ 4q = 48°
→ q = 12°
→ p + q
→ 44° + 12°
→ 56° (D.)
–