Find the area of a quadrilateral, if the length of one of its diagonal is 70 cm and the perpendicular distance from two opposite vertices to this diagonal are 40 cm and 20 cm.
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Area of Quadrilateral=(1/2×diagonal length×sum of the height of two triangles.) square units
diagonal of length=70cm
sum of height of two triangles=40+20=60
Aera of Quadrilateral=(1/2×70×60) cm²
(70×30)cm²
=2100cm². [60/2=30]
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