Geometry Help (1 Viewer)

[Andy005]

https://drive.google.com/open?id=0B_RlXPQTW1cRYktRTWhFTGFhcjQ

Thanks.

 

[1729]

https://drive.google.com/open?id=0B_RlXPQTW1cRYktRTWhFTGFhcjQ

Thanks.

If you draw a line through B parallel to MD then since the parallel lines divide transversal BC into equal intercepts it also divides transversal BE into equal intercepts. ie. BD = DE

But DE = BD = DA + AE (*)
And BD = DA + AC (**), so equating (*) and (**) gives DA + AE = DA + AC => AE = AC => Triangle ACE is isosceles.