What is the area of $△ A B C$ (in square cm) if AD is the median and area $△ A D B$ = 18 square cm?

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Solution

A median of the triangle divides it into two triangles of equal area.

So, Area ( $△ A B C$ ) = 2 × Area ( $△ A D B$ ) = 2 × 18 = 36 square cm.

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