Respuesta :

gmany

∠3 and ∠11 are corresponding angle, therefore m∠3 = m∠11.

m∠1 + m∠3 = 180° → m∠1 + m∠11 = 180°

m∠1 = 52° → 52° + m∠11 = 180°     |-52° → m∠11 = 128°

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