plisss donk jawab..besok dikumpulin

x + 2x = 90°
3x = 90°
x = 30°

sudut PQR = 2x = 2 × 30° = 60°

90° = 2x° + x°
90° = 3x°
x° = 90/3
x° = 30°

Jadi, besar sudut PQR
= 2x°
= 2.30°
= 60°

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