Sorry a few of these I don't know but I tried my best! I'm not sure if these are correct tho.
1.distance
2.Affordable
3. Employed
6.discuss
7.instructions
8.restraint
9.patience
10.entertainment
12.achievements
14.acceptance
15.procedure
16.infections
17.invention
18.Employees
19. Legendary
20.lost
Answer:
Only if its an isosceles triangle, just like the person above me said ^^