Answer:
1-90
2-55
3-35
Step-by-step explanation:
All the angles added up in one triangle should equal 180. Since you know 1 is a 90 degree angle, you add 90 and 55 to get 145, then subtract 145 from 180 to get 35. Two is 55 because the two angles are the same length. 3 is 35 because it is the unknown angle.
