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