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प्रश्न
Find the area of quadrilateral, whose diagonals of lengths 18 cm and 13 cm intersect each other at right angle.
उत्तर
When two diagonals of a quadrilateral intersect each other at right angles,
Area of quadrilateral = `(1)/(2) xx "Product of the diagonals"`
∴ Area of required quadrilateral
= `(1)/(2) xx 18 xx 13`
= 117cm2.
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