How to Find the Area and Circumference of Circles? (+FREE Worksheet!)

Open Circle Area & Circumference Practice in full screen

Open Circle Calculator in full screen

Learn how how to find the Area and Circumference of Circles when you have the radius or the diameter of the circle.

How to Find the Area and Circumference of Circles? (+FREE Worksheet!)
Original price was: $29.99.Current price is: $16.99.
Satisfied 52 Students

Watch this practice video for additional examples and reinforcement:


Related Topics

The Absolute Best Books to Ace Pre-Algebra to Algebra II

A step-by-step guide to solving Circles

  • In a circle, variable \(r\) is usually used for the radius and \(d\) for the diameter, and \(π\) is about \(3.14\).
  • Area of a circle \(\color{blue}{=πr^2}\)
  • Circumference of a circle \(\color{blue}{=2πr}\)

Circles – Example 1:

Find the area of the circle.
For education statistics and research

Use area formula: Area \(=πr^2\),
\(r=6\) \(\text{ in }\), then: Area \(=π(6)^2=36π\) For additional educational resources,.

\(π=3.14\), then: Area \(=36×3.14=113.04\) \(\text{ in }^2\) For additional educational resources,.

Circles – Example 2:

Find the Circumference of the circle.
For additional educational resources,.

Solution: For additional educational resources,.

Use Circumference formula: Circumference \(=2πr \)
\(r=9 \) \(\text{ cm }\), then: Circumference \(=2π(9)=18π \)
\(π=3.14\), then: Circumference \(=18×3.14=56.52\) \(\text{ cm }\) For additional educational resources,.

Circles – Example 3:

Find the area of the circle.
For additional educational resources,.

Solution: For additional educational resources,.

Use area formula: Area \(=πr^2\),
\(r=4\) \(\text{ in }\), then: Area \(=π(4)^2=16π\) For additional educational resources,.

Original price was: $27.99.Current price is: $17.99.

\(π=3.14\), then: Area \(=16×3.14=50.24\) \(\text{ in }^2\) For additional educational resources,.

Circles – Example 4:

Find the Circumference of the circle.
For additional educational resources,.

Solution: For additional educational resources,.

Use Circumference formula: Circumference \(=2πr \)
\(r=6 \) \(\text{ cm }\), then: Circumference \(=2π(6)=12π \)
\(π=3.14\), then: Circumference \(=12×3.14=37.68\) \(\text{ cm }\) For additional educational resources,.


The Best Book to Help You Ace Pre-Algebra For additional educational resources,.

Exercises for Solving Circles

Find the area and circumference of each circle. \((\pi=3.14)\)

Download Circles Worksheet

  1. \(\color{blue}{\text{ Area }: \ 50.24 \ \text{ in }^2, \ \text{ Circumference }: \ 25.12 \ \text{ in }}\)
  2. \(\color{blue}{\text{ Area }: \ 1,017.36 \ \text{ cm }^2, \ \text{ Circumference }: \ 113.04 \ \text{ cm }}\)
  3. \(\color{blue}{\text{ Area }: \ 78.5 \ m^2, \ \text{ Circumference }: \ 31.4 \ m}\)
  4. \(\color{blue}{\text{ Area }: \ 379.94 \ \text{ cm }^2, \ \text{ Circumference }: \ 69.08 \ \text{ cm }}\)

The Greatest Books for Students to Ace the Algebra

Related to This Article

What people say about "How to Find the Area and Circumference of Circles? (+FREE Worksheet!) - Effortless Math"?

No one replied yet.

Leave a Reply

X
51% OFF

Limited time only!

Save Over 51%

Take It Now!

SAVE $55

It was $109.99 now it is $54.99

The Ultimate Algebra Bundle 2026: From Pre-Algebra to Algebra II