Respuesta :

GH GI and HI are parallel to CB, AB and AC respectivele

m< A = 180 - 40 - 61 = 79 degrees
m < IHB = 79   ( < A and <IHB are corresponding angles)

and m < x = m < IHB)  = 79 degrees  ( < x  and  < IHB are internal alternate angles)

Answer is 79 degree