Answers

2015-12-28T08:50:07+05:30
If the quadrilateral is a square
let
side = 2

4triangles will be formed apb,bpc,cpd,apd
area of apb = area of cpd
area of triangle = 1/2xbxh=1/2x2x1=1cmsquare
product of area of triangles apb and cpd = 1x1=1cm square
area of bpc and apd = 1/2x2x1=1cm square
product = 1x1 = 1cm square
so
apbxcpd = apdxbpc
1cm square = 1cm square
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