Question

Name the intersection of planes ABFE and BFCD.

Answer 1

Two planes intersect in a line that contain all common points of these two planes.

1. Plane named ABFE contains points A, B, F and E.

2. Plane named BFCD contains points B, F, C and D.

As you can see points B and F are common points for these two planes, then the line of intersection is BF and its notation is $\overleftrightarrow{BF}.$

Note that notation $\overline{BF}$ stays for segments and notation $\overrightarrow{BF}$ stays for rays.

Answer: correct choice is A.