Q98 of 131 Page 226

Find the areas of the shaded region:

Radius of the smaller circle, r = cm

Radius of the larger circle, R = + 7 = cm

Area of shaded region = ∏R² - ∏r² =∏(R² - r²)

= = 303 cm²

∴ Area of shaded region = 303 cm²

Find the area enclosed by each of the following figures :

Find the areas of the shaded region:

100

A circle with radius 16 cm is cut into four equal parts and rearranged to form another shape as shown in Fig. 9.52:

Does the perimeter change? If it does change, by how much does it increase or decrease?