In figure 13.28,

side of square (a) = 8 cm

from the fig. we can see that of circle is placed at four parts of the square. if we join them a circle is formed with radius (r₁) 2 cm

Another circle is placed at centre of the square with radius (r₂) 2 cm

Area of colored region = Area of square - Area of circles at 4 corners + Area of circle at centre

= a² – (4 × ( × r₁²) + (π r₂²))

= a² – (π r₁² + π r₂²)

= 8² – (3.14 (2² + 2²))

= 38.88 cm²