Question

warthe following
11:52 Area of Circle
Terduga flowerbed of radius 7 m at the centre of a field. He needs to
urchase fertiliser. Irike of fertiliser is required for square metre area.
w much fertiliser should he purchase?
Arange the separate pieces as shown in Fig 11.36, which is roughly a parallelogram.
1
What will be the cost of polishing a circular table-top of radius 2 m at the rate
Oper square metre?
ban vou tell what we need to find in such cases, Area or Perimeter? In such
sine need to find the area of the circular region. Let us find the area of a circle, using
Draw a circle of radius 4cm on a graph paper(Fig 11.34) Find the area by counting
umber of squares enclosed.
leadges are not straight, we get a rough estimate of the area of circle by this method
There is another way of finding the area of a circle
Draw a circle and shade one half of the circle (Fig 11.350) Now fold the circle into
sights and cut along the folds (Fig 11.35()
Fig 11.35
Fig 11.34
Fig 11.36
The more sectors we have the nearer we reach an appropriate parallelogram.​

Answer 1

Step-by-step explanation:

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