Answer:
1. 30
2. 83.1
3. 90
Step-by-step explanation:
A triangle's angles always add up to 180. So, using this, you can subtract the two given angles from 180:
1. 180 - 117 - 33 = 30
2. 180 - 52.2 - 47.7 = 83.1
3. 180 - 57 - 33 = 90
I hope this helps :) let me know if you have any more questions.
