public void TestTriangleSquare(double a, double b, double c, double testSquare)
{
TriangleGeometry t = (TriangleGeometry)builder.BuildTriangleBySides(a, b, c);
var square = t.Square();
var isRightAngle = t.IsRightAngle();
Assert.AreEqual(square, testSquare);
Assert.AreEqual(isRightAngle, true);
}