public static void LocalCoordinates()
        {
            EquilateralTriangle         triangle    = new EquilateralTriangle(8);
            IList <CartesianCoordinate> coordinates = triangle.LocalCoordinates();

            Assert.AreEqual(3, coordinates.Count);
            Assert.AreEqual(triangleCoordinates[0], coordinates[0]);
            Assert.AreEqual(triangleCoordinates[1], coordinates[1]);
            Assert.AreEqual(triangleCoordinates[2].X, coordinates[2].X, Tolerance);
            Assert.AreEqual(triangleCoordinates[2].Y, coordinates[2].Y, Tolerance);
        }