Answer:
m∠DAB = 91 degrees
Step-by-step explanation:
Total degree of a parallelogram = 360
m∠CDA = m∠ABC
Let x represent m∠DAB & m∠DCB
m∠CDA + m∠ABC + m∠DAB + m∠DCB = 360 degrees
89 + 89 + x + x = 360 degrees
Add 89 + 89
178 + x + x = 360
Subtract 360 - 178
x + x = 182
Divide 182 by 2
x = 91 degrees
so the m∠DAB = 91 degrees
