In Fig. 15.90, D and E are two points on BC such that BD=DE=EC. Show that ar(Δ ABD) = ar(Δ ADE) =ar(Δ AEC)
Draw a line through A parallel to BC
Given that,
BD = BE = EC
We observed that the triangles ABD and AEC are on the same base and between the same parallels l and BC
Therefore, their areas are equal
Hence,
Area () = Area (
) = Area (
)