5r^2-44r+120 = -30r+11r
1 answer:
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Answer:
b + d = 180°, a = d and a = c
Step-by-step explanation:
With the figure we can see that the only way for them to be parallel is that the angles are similar with their counterpart, for example that a = d. a = c will show that all angles are equal in order to be m and n parallel. Finally b + d = 180° shows that the only way for this to be true is that m and n are parallel.
