def test_area_earthling1(self):
vx = Vector((1,0,0))
vy = Vector((0,1,0))
result = vx.area(vy)
self.assertAlmostEqual(result, 1)
def test_area_earthling2(self):
vx = Vector((2,0,0))
vy = Vector((1,rt2(3),0))
result = vx.area(vy)
self.assertAlmostEqual(result, 2*rt2(3))
def test_area_martian3(self):
qx = Vector((D,0,0)).quadray()
qy = Vector((R,rt2(3)/2,0)).quadray()
result = qx.area(qy)
self.assertAlmostEqual(result, 1, 7)
