Solve your doubts and expand your knowledge with IDNLearn.com's extensive Q&A database. Our platform offers reliable and comprehensive answers to help you make informed decisions quickly and easily.

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 :

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

_____________________

Your engagement is important to us. Keep sharing your knowledge and experiences. Let's create a learning environment that is both enjoyable and beneficial. Find precise solutions at IDNLearn.com. Thank you for trusting us with your queries, and we hope to see you again.