Answer:
1 =68
2=68
3=125
Step-by-step explanation:
1.all interior angles adds up to 180:
180-39-73=68
2. opposite angles are equal so angles 1 and 2 are opposite therefore they are equal.
3. the sum of angles in a quadrilateral adds up to 360. so 360 - 90 - 68 -77= 125
