Respuesta :

alexjbodnar
a straight angle is equal to 180 degrees. 180-80=100. 100-60=40. so y=40. vertical angles are congruent so x=40 degrees.
angle y making a line with 80° and 60° it means their sum should be =180°
 80°+60°+y=180°
y=40°  so x=40° because they are vertical angels and vertical angels are equal