@Test
  public void testGetB() throws InvalidDataException {
    PythagoreanTheorem p = new PythagoreanTheorem();

    p.setAC(10, 15);

    double b = p.getB();

    Assert.assertEquals(11.18, b, 0.01);
  }
  @Test
  public void testGetC() throws InvalidDataException {
    PythagoreanTheorem p = new PythagoreanTheorem();

    p.setAB(2, 4);

    double c = p.getC();

    Assert.assertEquals(4.47214, c, 0.01);
  }
  @Test
  public void testGetA() throws InvalidDataException {
    PythagoreanTheorem p = new PythagoreanTheorem();

    p.setBC(5, 8);

    double a = p.getA();

    Assert.assertEquals(6.24, a, 0.01);
  }