Question

find the area of shaded portion​

Answer 1

Answer:

Step-by-step explanation:

Area of shaded region = Area of square PQRS - (Area of triangle QRU + Area of triangle TSU + Area of triangle QPT ) = 400 − (100 + 50 + 100) = 400 – 250 = 150 sq. cm. So, the area of the shaded portion = 150 sq.

Answer 2

Answer:

1st diagram : 63cm²

2nd diagram = 5.4cm²

Step-by-step explanation:

1st diagram

area of the rectangle = 10cm x 14cm = 140cm²

area of the semicircle = π r²/2 = 22/7 x 7² x 1/2 = 22 x 7/ 2 = 77cm²

Area of the shaded region = 140cm² - 77cm² = 63cm²

2nd diagram

area of the square = 5cm x 5cm = 25cm²

area of the circle = π r² = 22/7 x (2.5)² = 22/7 x 6.25 = 19.6cm²

area of the shaded region = 25cm² - 19.6cm² = 5.4cm²