Function: polysideInnerRadius()
function polysideInnerRadius(
   outerRadius, 
   sidesCount, 
   sagitta): number;
Defined in: sketches/cannedSketches.ts:164
Helper function to compute the inner radius of a polyside (even if a sagitta is defined
Parameters
outerRadius
number
sidesCount
number
sagitta
number = 0
Returns
number