#include <stdio.h>
#include <math.h>
#include "prog04header.h"

/* prog04_5.c */
XY CalcCentroid( Triangle triangle ){
  XY centroid;

  centroid.x = (triangle.vertex[0].x + triangle.vertex[1].x
		+ triangle.vertex[2].x) / 3.0;
  centroid.y = (triangle.vertex[0].y + triangle.vertex[1].y
		+ triangle.vertex[2].y) / 3.0;
  return centroid;
}