cpp object array - polymorphism does not work properly

Question

say I have classes: Square Circle etc. , all inheriting from class Shape, each has a draw Method. ( Shape::draw() does nothing)

I made a Template of a dynamic array, as such:

template <class T>
Array<T>::Array()
{
    cap = 8; // First allocation
    len = 0;
    array = new T[cap];

}

template <class T>
T* Array<T>::operator [] (unsigned int index)
{
    return &array[index]; // return array element
}
    template <class T>
void Array<T>::add(const T &item)
{
    len++;
    if (len > cap)
    {
        cap *= 2;
        array = (T *)realloc(array, sizeof(T) * cap);
    }
    array[len - 1] = item;
}

when I run this simple code on main:

Shape *s;
OrthogonalTriangle t = OrthogonalTriangle( 12);
s = &t;

s->draw();

Array<Shape> A;
A.add( t );
A[0]->draw();

well, first draw works, and draws the triangle. second one just calls Shape::draw()

I tried almost evrything inclouding changing the template entirely and returning pointers, or by ref...