What is the Circumference of a Circle?  Perimeter of a Circle  Don't Memorise  Summary and Q&A
TL;DR
Pi is a special constant that represents the ratio of the circumference to the diameter of a circle, and it is approximately equal to 3.14 or 22/7.
Key Insights
 🥳 Pi is a constant that represents the ratio of a circle's circumference to its diameter.
 ♓ Pi is approximately equal to 3.14 or 22/7.
 ♓ The circumference of a circle can be calculated by multiplying the diameter by Pi or using the formula 2PiR.
 🏑 Pi is a fundamental constant in mathematics with various applications in different fields.
 ♓ The value of Pi is consistent for all circles, regardless of their size or radius.
 ♓ The approximate value of Pi as 3.14 is commonly used for most calculations.
 😑 Pi is an irrational number, meaning it cannot be expressed as a simple fraction.
Transcript
Here's a very interesting question. What is Pi? Assume we draw a circle of radius three centimeters. It will look something like this. As we know this red boundary of the circle will be its perimeter. We have a special name for the perimeter of a circle. It's called the circumference of the circle. But how do we measure the circumference of the cir... Read More
Questions & Answers
Q: What is Pi?
Pi is a mathematical constant that represents the ratio of a circle's circumference to its diameter. It is denoted by the Greek letter "π" and is approximately equal to 3.14 or 22/7.
Q: How is the circumference of a circle calculated using Pi?
The circumference of a circle is found by multiplying the diameter of the circle by Pi. Alternatively, it can be calculated using the formula 2PiR, where R is the radius of the circle.
Q: Is Pi the same for all circles?
Yes, Pi is a constant value that is the same for all circles. It does not depend on the size or radius of the circle.
Q: Why is Pi considered an important constant in mathematics?
Pi is a fundamental constant in mathematics because it appears in various formulas and calculations involving circles and curves. It has numerous applications in geometry, trigonometry, calculus, and physics.
Summary & Key Takeaways

Pi is the ratio of a circle's circumference to its diameter, and it is constant for all circles.

The circumference of a circle can be calculated by multiplying Pi by the diameter or by using the formula 2PiR, where R is the radius.

Pi is approximately equal to 3.14 or 22/7, and it is a fundamental constant in mathematics.