public void GetArea_2_5_4()
        {
            const double expected_area = 3.7996710384;
            IShape       t             = new Ttriangle(2, 5, 4);

            Assert.AreEqual(expected_area, t.GetArea(), 0.00000000001);
        }
        public void IsNotRight()
        {
            IShape t = new Ttriangle(3, 4, 6);

            Assert.AreEqual(false, ((Ttriangle)t).IsRight());
        }
        public void IsRight()
        {
            IShape t = new Ttriangle(3, 4, 5);

            Assert.AreEqual(true, ((Ttriangle)t).IsRight());
        }
 public void Ttriangle_NotExisting()
 {
     IShape t = new Ttriangle(1, 2, 3);
 }
 public void Ttriangle_2_4_5()
 {
     IShape t = new Ttriangle(2, 4, 5);
 }