Respuesta :

m<AFB + m<BFD + m<EFD = 180
23 + m<BFD + 69 = 180
m<BFD + 92 = 180
m<BFD = 88


m<EFB = m<EFD+m<BFD
m<EFB = 69+88
m<EFB = 157 degrees
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