Respuesta:
θ + θ + θ + 90 = 180
3θ + 90 = 180
3θ = 180 - 90
3θ = 90
θ = 90/3
θ = 30
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Verified answer
Respuesta:
θ + θ + θ + 90 = 180
3θ + 90 = 180
3θ = 180 - 90
3θ = 90
θ = 90/3
θ = 30