Construct inscribed/circumscribed circles of triangles and prove angle properties of cyclic quadrilaterals.
Choose a triangle center from the required equal distances
Problem
A sprinkler must be equally far from the \(\text{three}~\text{corner}~\text{points}\) of a triangular garden. Identify the appropriate triangle center, its defining construction lines, the equal-distance relationship, its circle role, and whether it must lie inside the garden.
The decisive question is what must be equally distant: vertices or side lines. We’ll match the three corner-point distances to their defining loci, intersect two of those loci to identify the center, and then check how the triangle’s shape affects whether that point lies inside.
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