Perpendicular edges form a right angle, and since the figure is a rectangular prism each edge that meets at a point are perpendicular.
Bases on the figure, the edges that are perpendicular to [tex] \overline {JA} [/tex] are:
A) [tex] \overline {JT} [/tex]
B) [tex] \overline {EJ} [/tex]
C) [tex] \overline {RA} [/tex]
Your answers are A, B, and C.
