m = -1; θ=135
m = 80/189; θ=22.94
(0,4); (4,0)
m= 12/7; θ=59.74°
(13,3); (-13,-3)
(3/4, 7/5); (-8/5, 7/4)
m = -7/47; θ=171.52°
(3,3); (6,3)
m = 0; θ= 0
m = 77/90; θ= 40.54°
(-9/11,-5/9);(1,1)
(-4,-5);(3,7)
m = 3/13; θ=12.99°
(-9,4/9); (-3/5,4)