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# Q.7 Find the perimeter of the adjoining figure, which is a semicircle including its diameter.

Perimeter of the adjoining figure = $$\frac{2 \pi r}{2} + 2r = \pi r + 2r$$
$$= \frac{22}{7} × 5 + 2×5 = \frac{110}{7} + 10 = \frac{180}{7} cm$$ = 25.71 cm