#ifndef triangle_h
#define triangle_h


#include <stdlib.h>
#include <math.h>
#include "shape.h"

double triangleArea(Shape* triangle) {
    double side = triangle->perimeter / 3;
    double area = (sqrt(3) / 4) * (side * side);
    return area;
}

Shape* newTriangle(double perimeter) {
    Shape* triangle = malloc(sizeof(Shape));
    triangle->numSides = 4;
    triangle->perimeter = perimeter;
    triangle->area = triangleArea;
    return triangle;
}

#endif