Problem here and I have it drawn out, and made my right angle, but kinda stuck.

Building is shaped like a pentagon with a 92.5 m on each side. A fence surrounds the building to form a circle, and each corner of the building is to be 25.0 m from the closest point on the fence. How much fencing is required.

I know I cut the length to 46.25 m and I have the 90 degree angle, I am not sure what to do next.

Any ideals. thanks

Joanne