Question

What is the BEST approximation of the area of the shaded region in the figure below?

Answer 1

Answer:

Area of the shaded region$= 50.24 cm^2$

Step-by-step explanation:

Area of the shaded region=Area of the big circle - Area of the small circle

Radius of big circle= 5 cm

Area of the circle=$\pi r^2$

As, $\pi =\frac{22}{7} =3.14$

Area =

                  $=3.14*5*5\\\\=3.14*25\\\\=78.5cm^2$

Radius of the small circle= 5-2= 3 cm

Area of the small circle=

                    $=3.14*3*3\\\\=3.14*9\\\\=28.26cm^2$

Area of the shaded region= $78.5-28.26$ $= 50.24 cm^2$