Question

in quadrilateral ABCD . AB is equal to DC if area of triangle ABC is equal to area of triangle ABD prove that ABCD is a parallelogram​

Answer 1

Answer:

in triangle ABC

the arae of triangle=1/2(base×height)

so ac×ab=area of triangle ABC eq1

similarly the area of triangle ABD eq2

area of parallogram=area of triangle (ABC+ABD)