Answer:
angle A=68°
angle B=68°
angle D= 111°
Step-by-step explanation:
angle D = angle C
angle D = 111°
interior angle of a quadrilateral=360°
angles A and B are equal . represent them by a°
a°+a°+111°+111°=360°
2a°+222°=360°
2a°=360°-222°
2a°=138°
2a°/2=138°/2
a°=68°
therefore angle A=68° and angle B =68°
