Answer:
1. m<AOB = 50 degree
2. m<COD = 90 degree
3. m<BOD = 130 degree
4. m<AOD = 180 degree
Explanation:
1. We see that <AOB has one leg at 0 and the other leg at 50 degrees, so the <AOB is 50 degrees.
2. We see that <COD has one leg at 0 and the other leg at 90 degrees, so the <COD is 90 degrees
3. We see that <BOD has one leg at 50 and the other leg at 180 leg, so the <BOD is 180 - 50 = 130 degree
4/ We see that <AOD has one leg at 0 and the other leg at 180 degrees, so the <AOD is 180 - 0 = 180 degrees