Question

7. Find the perimeter of the adjoining figure, which is a semicircle including
its diameter=10 cm​

Answer 1

Answer:

7.85cm

Step-by-step explanation:

Diameter (d) = 10cm

Radius (r) = 5cm

Perimeter = πr/2

                = 3.14 ×5/2

                = 15.7/2

                = 7.85cm

Answer 2

Answer:

7.8

Step-by-step explanation:

perimeter of a semicircle = 1/2×22/7× r

diameter =10cm

radius =d/2 =5cm

perimeter of a semicircle = 1/2×22/7×5

= 7.8