I was not able to understand this question, can someone help please? Thank you!
oh yey geometry where I can use my faulty intuition
AB//CD
ED//BC
AE//BD
Theorem (in my own words): Two triangles have the same area if they share a base and their height is presumably equal.
Count all the triangles that have base AB that has the other two sides joining on a point lying on line DC
Count all the triangles that have base DB that has the other two sides joining on a point lying on the line EA
Count all the triangles that have the base AD that has the other two sides joining on a point lying on.... oh wait! AD is NOT parrelel to BD. So there is only one triangle for this case.