Question

find find the area of the semicircle whose diameter is 40 cm​

Answer 1

Answer:

628cm²

Step-by-step explanation:

diameter = 40cm

radius=20cm

AREA =1/2 *πr²

          = 1/2 *3.14 * 20*20

          = 314/100*10*20

          = 314/100*200

          =314*2

          =628 cm²

Answer 2

Answer:

628 cm²

Step-by-step explanation:

Diameter = 40cm

Radius = 40/2 = 20cm

Area of semi circle =

                                   $\frac{\pi r^{2} }{2} \\\\\frac{3.14(20)^{2} }{2} \\\\1.57 * 400\\\\628cm^{2}$