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pindalaArvutaja.h

+#include <stdlib.h>
+#include "seeStruct.h"
+
+double pindala(seeStruct A[], seeStruct B[], seeStruct C[], int i)
+{
+    double S;
+    S = abs((A[i].x * (B[i].y - C[i].y) + B[i].x * (C[i].y - A[i].y) +
+                      C[i].x * (A[i].y - B[i].y))/2);
+     return S;
+}