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Shaded Region in a Trapezium with a Semicircle

Shaded Region in a Trapezium with a Semicircle

Secondary 1

The figure below shows trapezium \(ABCD\) and semicircle \(DFC\). In the figure, \(AB=14\) cm, \(BC=5\) cm, \(AD=5\) cm, height \(4\) cm and the diameter of the semicircle with centre \(E\) is \(8\) cm.

Calculate

  1. the area of the shaded region.
  2. the perimeter of the shaded region.

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Answer:(a) \(18.9 \text{ cm}^2\) (b) \(36.6 \text{ cm}\)

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