ABCD is a parallelogram with area as 12cm2.If BD is one of the diagonals of ABCD,find ar (triangle ABD). Share with your friends Share 2 Priyanka Kedia answered this Refer the following link : https://www.meritnation.com/ask-answer/question/abcd-is-a-rectangle-and-bd-is-1-of-its-diagonals-if-ar-tri/math/9074081 1 View Full Answer The Mykey Siddharth answered this Ar (ABCD) = 12cm2.BD is a diagonal, so:-Ar (ABD) = 1 / 2 Ar (ABCD).(Bcz. a diagonal of a //gm divides the //gm into two congruent triangles with same area).Therefore, Ar (ABD) = 12 / 2 = 6cm2.Hope it helps and have a good day...!!!! 7