an exterior angle has been drawn at each of the three vertices of SPM determine the measure of each of the three exterior angles

an exterior angle has been drawn at each of the three vertices of SPM determine the measure of each of the three exterior angles class=

Respuesta :

The measure of an exterior angle is found by adding the remote interior angles together. Angle BSM = 180-43-59=78.
43+59=102 = BSR.
59+78=137 = QBM.
78+43=121 = SMT.