diagonals AC and BD of a trapezium ABCD intersects at O .prove that ar(AOD)=ar(BOC)
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It is given that:
Area (ΔAOD) = Area (ΔBOC)
Area (ΔAOD) + Area (ΔAOB) = Area (ΔBOC) + Area (ΔAOB)
(BY adding area(AOB) to both sides)
Area (ΔADB) = Area (ΔACB)
We know that triangles on the same base having areas equal to each other lie between the same parallels
Therefore, these triangles, ΔADB and ΔACB, are lying between the same parallels i.e.,
AB || CD
Therefore, ABCD is a trapezium
HOPE IT'S HELPFULLY ^_^ ^_^
Area (ΔAOD) = Area (ΔBOC)
Area (ΔAOD) + Area (ΔAOB) = Area (ΔBOC) + Area (ΔAOB)
(BY adding area(AOB) to both sides)
Area (ΔADB) = Area (ΔACB)
We know that triangles on the same base having areas equal to each other lie between the same parallels
Therefore, these triangles, ΔADB and ΔACB, are lying between the same parallels i.e.,
AB || CD
Therefore, ABCD is a trapezium
HOPE IT'S HELPFULLY ^_^ ^_^
rakshit233:
I am from vijapur
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