Tentukan pertanyaan a sampai g

sudut a-g = 90 derajat

∠a = 180° - 150° = 30°
∠b = 180° - ∠a = 150°
∠c = 180° - 150° = 30°
∠d = ∠a = 30°
∠e = 150°
∠f = ∠b = 150°
∠g = ∠c = 30°

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