Math Help - Supplementary angles

1. Supplementary angles

Which is supplementary to θ = 2π / 5?

a) 3π / 5
b) 3π / 10
c) 7π / 5
d) -8π / 5
e) None of these

Thanks for any help!

2. Originally Posted by live_laugh_luv27
Which is supplementary to θ = 2π / 5?

a) 3π / 5
b) 3π / 10
c) 7π / 5
d) -8π / 5
e) None of these

Thanks for any help!
two angles are supplementary if their sum is $\pi$

3. Originally Posted by skeeter
two angles are supplementary if their sum is $\pi$
Ok, that's what I thought..
so, it's a.