Hi
This is regarding Q5 Pg 218 of the 3rd edition Geometry Strategy Guide. In your solution, you’ve said that (on pg 229) triangles CDF and DFE ‘ have the same heights relative to bases CD and DE’. Can you please explain to me how we know that the height in question which I suppose is DF is a height indeed? What info exactly in the question/ figure tells us that FD is even perpendicular to CE for us to know that it’s a height? Is there a rule regarding the common vertex that leads to this outcome then?
Thanks any input on this question will be seriously appreciated given that its such a bouncer!