public void EllipseParameterizedConstructor()
{
var semiMajorAxis = 10;
var semiMinorAxis = 20;
sut = new Ellipse(semiMajorAxis, semiMinorAxis);
Assert.That(sut.CalculatePerimeter(), Is.EqualTo(2 * Math.PI *
Math.Sqrt(
(Math.Pow(semiMajorAxis, 2) + Math.Pow(semiMinorAxis, 2)) / 2)));
Assert.That(sut.CalculateArea(), Is.EqualTo(Math.PI * semiMajorAxis * semiMinorAxis));
}