This cache is an exercise in mathematics; geometry to be precise. Given below are the corners of Triangle ABC. This cache is found at the confluence of the three PERPENDICULAR BISECTORS OF THE SIDES of the triangle. You are looking for a decon container.
Note: my measurements were taken using UTM although standard N/W should do the trick.
Capital Region Mathematics Quest caches by tenebrus
Orthocenter
Centroid
Circumcenter
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