Question

Two intersecting lines l and m form an angle of 56° with each other. The reflection of a point (–4, 1) along the line l followed by a reflection along line m will cause a ________ rotation. Question 18 options: A) 56° B) 112° C) 180° D) 28°

Answer 1

B) 112°

Explanation:

After the double reflection the point is effectively rotated by an amount that is double the angle between the lines of reflection:

2·56° = 112°

_____

In the attached, lines l and m are separated by 56°, as required by the problem statement.