mohon dengan caranya yaa

(7x + 10)° + (4x + 5)° = 180°
7x° + 4x° + 10° + 5° = 180°
11x° = 165°
x = 15°

pelurus ∠POR = ∠ROQ = (7x + 10)° = 7(15) + 10 = 115°

maaf kalau salah, semoha membantu