Question

A circle has a radius of 20 cm. = 3.14

What is its perimeter (to the nearest tenth)?
cm.

What is its area (to the nearest tenth)?
cm2.

Answer 1

Given:-

• Radius of circle = 20 cm

Find:-

• Perimeter of circle
• Area of circle

Evaluation

Required Formula

`\star{\boxed{\red{\tt{\:Area_(circle)\:=\pi\:r^2}}}}`

`\star{\boxed{\pink{\tt{\: Perimeter_(circle)\:=\:2\:\pi\:r}}}}`

First Calculator,

==> Perimeter of circle = 2πr

Where,

• π = 22/7 = 3.14
• r = 20 cm

so,

==> Perimeter of circle = 2 × 3.14 × 20

==> perimeter of circle = 125.6 cm

Now, Calculate Area

==> Area of circle = πr²

==> Area of circle = 3.14 × 20²

==> Area of circle = 1256 cm²

Hence

• Perimeter of circle = 125.6 cm
• Area of circle = 1256 cm²

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