Hello /k/omrades

I am perplexed. I've been trying to figure out how you could make a star fort work with a 3 sided fort - specifically an equilateral triangle. So far I haven't been able to figure out the angles and measurements of the turrets to allow for a completely covered design.

Given an equilateral triangle shaped star fort with walls 150 yards in length and any dimensions you need (within reason) for the turrets located at the points, is it possible to have a completely covered perimeter as in pic related?

Bonus points if you can draw it.