The diagonal of a quadrilateral is 80 cm in length and the length of perpendicular of it from the opposite vertices are 20cm and 20cm. find the area of the quadrilateral
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Answer:
diagonal = 20cm=1/5m
perpendiculars = 8.5 and 11.5
area of quad. abcd=ar(∆abc) +ar(∆adc)
=1/2×ac×bl + 1/2×ac×dm
=1/2×1/5×8.5 + 1/2×1/5×11
=85+110/5
=195/5
=39 m or 3900 cm
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