Question

If two paralleloprams lie on the same base and between same parallel lines then prove that ares of parallelograms are equal

Answer 1

proving ∆ ade =~ ∆ bfc
ad = bc ......... side of same parallelogram
de = cf
ab = ef ........ ab = DC , ef= DC
ae + eb = eb +bf
ae = b
∆ AED =~ ∆ BFC ...... S-S-S
∆aed + EBCD =~ ∆bfc + EBCD
abcd ~= efcd ..... proved