The correct answer is A. All triangles' interior angles equal 180.
Answer:
m = 2
Step-by-step explanation:
Slope Formula: 
Simply plug our coordinates into the slope formula and solve for <em>m</em>:
m = (5 - 3)/(4 - 3)
m = 2/1
m = 2
The LCD of 11/20 and 31/45 is 180
20 40 60 80 100 120 140 160 180
45 90 135 180