Centroid is the point in the middle of a triangle .
Geometrical centre of a triangle is the intersection of all the three medians drawn from it's 3 vertices.
Here A,B,C are the three vertices. And medians are drawn from all the three vertices. These medians tend to intersect each other at a point G, which is known as Centroid of the triangle. This point is the geometrical centre of the triangle.
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