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In parallelogram ABCD, AB=51CM ,BC=37CM AND BD=20 CM THEN FIND THE ARE OF PARALLELOGRAM ABCD

In parallelogram ABCD, AB=51CM ,BC=37CM AND BD=20 CM THEN FIND THE ARE OF PARALLELOGRAM ABCD

Grade:9

2 Answers

suvidhi mehta
292 Points
4 years ago
we have the three sides of triangle ADB  we can find its area by herons formula and double it to get the answer since the two triangle about the diagonal are congruent and have same area 
  s=(a+b+c)/2
and area of triangle = s(s-a)(s-b)(s-c)1/2
suvidhi mehta
292 Points
4 years ago
in above answer under root is over whole expression
a,b,c are sides of triangle and s is called the semi perimeter

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