Question

find the area of shaded region of square whose side is 10 cm ​

Answer 1

Answer: 100 cm^2

Step-by-step explanation:

Formula of area of square = side x side

Side = 10 cm

By formula = 10 x 10

= 100 cm^2

Answer 2

Answer:

57cm²

Step-by-step explanation:

Let Unshaded regions be 1, 2, 3 and 4

 Area of 1 + Area of 3= Area of ABCD – Areas of two semicircles of each of radius 5 cm 

Area of 1 and 3 = ( 10 * 10 - 2 * 1/2 * 3.14 * 5 *5)  [Area of semi circle                                                                                         =  1/2  pie r²]

                         = (100 - 3.14 * 25)

                         = (100 - 78.5)

                         =21.5 cm²

So,

Even the Area of 2 and 4 is equal to 21.5cm²

So,

Area of shaded region = Area of ABCD - Area 0f( 1+2+3+4)

                                      = 100 - (21.5 + 21.5)

                                      = 100 - 43

Area of shaded region = 57cm²