ABCD is a square. E and F are respectively the mid – points of BC and CD. If R is the mid point of EF. Prove that : ar(△AER) =…
Since R is the mid point of EF .
∴ AR is the median in △AEF.
As, a median of a triangle divides it into two triangles of equal area .
∴ ar(△AER) = ar(△AFR)