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Statistics

Question

Area of a quadrilateral =

$1 half$ x a diagonal x sun of the perpendiculats on the diagonal

a diagonal x sum of the perpendiculars on the diagonal

$1 third$ x a diagonal x sun of the perpendiculats on the diagonal
$1 fourth$ x a diagonal x sun of the perpendiculats on the diagonal

Solution

1 half

x a diagonal x sun of the perpendiculats on the diagonal