Saturday, 27 August 2016

The given figure is created by using the arcs of quadrants with radii 1cm,2cm and 3cm.Find the total area of the shaded region.Take pi is equal to 3.14













Solution:To find
1.Find the area of all the smallest petals =8xarea of the smallest arc
2.Find the area of all the smallest petals =8xarea of the intermediate  arc
3.Find the area of all the smallest petals =8xarea of the biggest arc
4.The area of shaded region =8xarea of the smallest arc+8xarea of the biggest arc-8xarea of the intermediate  arc
5.The area of an arc=area of sector-area of the triangle inside =theta/360xx(radiu)^2-1/2x(radius)^2
6.Therefore ,
         1.The area of all the smallest petals=2.28cm^2
         2.The area of all the medium size  petals=9.12cm^2
         3.The area of all the largest petals=20.25cm^2
7.The entire shaded area in the figure=2.28cm^2+(20.25cm^2-9.12cm^2)=13.41cm^2(Answer)

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