Use DEF.

An isosceles triangle EDF with height EG. The sides ED and EF are indicated to have equal lengths. The lengths FG and GD is 3a and (a plus 6) respectively.

Which of the following describes GE¯¯¯¯¯¯¯¯
G
E
¯
? Check all that apply.
A. angle bisector
B. median
C. perpendicular bisector
D. altitude