public void TestTrapezoidArea2()
{
Trapezoid trapezoid = new Trapezoid(8, 4, 2);
Assert.AreEqual(12, trapezoid.Area());
}
public void TestTrapezoidArea()
{
Trapezoid trapezoid = new Trapezoid(20, 15, 10);
Assert.AreEqual(175, trapezoid.Area());
}