Question

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

Answer 1

Diameter = 10 cm
$\therefore$ $Radius=\frac{10}{2}=5cm$
According to question,
Perimeter of figure = Circumference of semicircle + diameter
$=\frac{2\pi r}{2}+D$
$=\frac{22}{7}\times 5+10=\frac{110}{7}+10$
$=\frac{110+70}{7}=\frac{180}{7}=25.71cm$
Thus, the perimeter of the given figure is 25.71 cm