Answer:
12. 6= 68°
15. 4= 52°
Step-by-step explanation:
12.
since 5= 22°
5+6= 90° since it Is a right angle
6= 90-22
therefore 6 is 68°
15.
since 3 is 38°
and 3+4= 90° since it is a right angle
4= 90-38
therefore 4 is 52°
