Definition of supplementary angles. Hope this helps. Can you mark me as brainliest if you can? I really appreciate it!
Answer:
17
8/17
Step-by-step explanation:
x=
sin∠D = 
1/3 times 1/5 equals 1/15. That is already simplified :).
9514 1404 393
Answer:
2160°
Step-by-step explanation:
The sum of interior angles of a convex n-gon is ...
angle sum = 180(n -2)°
When n=14, the angle sum is ...
angle sum = 180(14 -2)° = 2160°