The pairs of angles<span> on one side of the transversal but inside the two lines are called </span>сonsecutive interior angles<span>.
</span>∠6 and ∠1
∠7 and ∠4
<span>
С and D options.</span>
Answer:

Step-by-step explanation:

Therefore the answer is

The slopes of perpendicular lines are opposite and reciprocals.
50 degrees since a triangle is 180 degrees and the other 2 are 40 and 90