A hotel wants to put a fence around a circular spa. The radius of the spa is 5/√2-1 feet. If the fence is built along the immediate edge of the spa, what is the perimeter of the fence? (Recall that the
perimeter of a circle is 2πr , where r is the radius of the circle.)

Question

A hotel wants to put a fence around a circular spa. The radius of the spa is 5/√2-1  feet. If the fence is built along the immediate edge of the spa, what is the perimeter of the fence? (Recall that the 
perimeter of a circle is 2πr , where r is the radius of the circle.)

agent0smith · Answer

The perimeter of the fence is just equal to the perimeter of the spa, since the fence is built right along the edge.

$$P = 2πr = 2π (\frac{ 5 }{ \sqrt{2} } -1) $$units are feet

I can't tell if that's the correct radius, since idk if you meant (5/√2)-1 or 5/√(2-1) or 5/(√2-1)  feet for the radius.

anonymous · Answer

ots the first one :P