Answer:
2=137⁰
3=31⁰
1=47⁰
Step-by-step explanation:
2 is on a straight line with 43 and a straight line is 180 degrees so 180-43=137
A triangle has 180 degrees and we figured out 2 so 137+12 then subtract from 180 equals 31 degrees
3. The box in the triangle represents 90⁰ so 43 + 90 then subtract from 180 equals 47
