Question

Find the area of the shaded region.​

Answer 1

   

Area of the shaded region = the area of the trapeze - the area of the triangle.

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$\displaystyle\\A=\frac{(32+17)\times21}{2}-\frac{11\times9}{2}\\\\A=\frac{49\times21}{2}-\frac{99}{2}\\\\A=\frac{1029}{2}-\frac{99}{2}\\\\A=\frac{1029-99}{2}\\\\A=\frac{930}{2}\\\\\boxed{\bf~A=465~mm^2}$