What is the length of DF?
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.
![What is the length of DF 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 class=](https://us-static.z-dn.net/files/d45/b4c4a877d3edb50b4fa0a3085447de1c.png)