Answered

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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.

Sagot :

BrainlyRadheidn

Solution

Given:-

  • Radius of circle = 20 cm

Find:-

  • Perimeter of circle
  • Area of circle

Evaluation

Required Formula

[tex]\star{\boxed{\red{\tt{\:Area_{circle}\:=\pi\:r^2}}}}[/tex]

[tex]\star{\boxed{\pink{\tt{\: Perimeter_{circle}\:=\:2\:\pi\:r}}}}[/tex]

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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