Question

Help would be really appreciated.

Answer 1

1) Set 1 angle a= 90°

2) 180-90-45= 45°

3) Set 2 angle b= 180-90-75= 15°

4) Set 2 angle c= 90°

5) angle a= 90°

6) angle b= 90°

7) angle c= 45°

8) angle d= 90°

9) angle e= 45°

10) angle f= 45°