Question

Planes X and Y are perpendicular. Points A, E, F, and G are points only in plane X. Points R and S are points in both planes X and Y. Lines EA and FG are parallel.

Planes X and Y are shown. Lines A E and F G are vertical and are on plane X. Line R S is at the intersection of the 2 planes.
Based on this information, which pair of lines, together, could be perpendicular to RS? Select two options.

Line E A
Line E R
Line E F
Line F G
Line F S

Answer 1

Line EA and Line FG.

Reason: EA and FG lie in plane X and are parallel (given). They can be drawn perpendicular to the intersection line RS (which lies in plane X), so both could be perpendicular to RS.