Question

Mahmoud is doing some plumbing repairs. He runs a pipe through a rectangular wall making a 70 angle. Afterward, he puts the pipe

through another wall which is parallel to the first. Mahmoud can therefore assure the homeowner that the pipe forms a ____ angle
with the second piece of wall.

Answer 1

The correct option is;

(D) 70°

Explanation:

By running the pipe through the first wall, to the second wall which is perpendicular to the first, we have;

The angle the pipe makes = 70°

Therefore, due to the spring back effect the formed by the pipe when bent 90° is 70°

Therefore, By running the pipe from the second wall, to the third wall which is parallel to the first, and perpendicular to the second wall, the angle the pipe forms is also a 70° angle

Mahmoud can therefore assure the home owner that the pipe forms a 70° angle with the second piece of the wall.