Question

Perimeter and Area...
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Answer 1

Answer:

area of circle=πr^2

area of big circle=3.14x10x10

=314 cm^2

area of small circle=3.14x4x4

=50.24 cm^2

area of shaded region= 314-50.24

=263.76

Step-by-step explanation:

Answer 2

⚝Given

➺ Radius of larger circle is 10cm

➺ Radius is smaller circle is 4cm

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⚝To Find

(a) Area of larger circle

(b) Area of smaller circle

(c) Area of shaded part

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✧Formula to find Area of circle

A=πr²

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⚝Solution

(a) Area of larger circle

➝ A=πr²

➝ A=3.14×10×10

➝ A= 314cm²

Thus the area of the larger circle is 314cm².

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(b) Area of the smaller circle

A=πr²

➝ A=3.14×4×4

➝ A=3.14×16

➝ A=50.24

Thus the area of the smaller circle is 50.24cm²

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(c) Area of shaded part:-

The area of the shaded part will be:-

Area of larger circle - Area of smaller circle

So,

Area of shaded part

➝ 314-50.24

➝ 623.76 cm²

Thus the area of the shaded part is 623.76 cm²

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