Home Practice
For learners and parents For teachers and schools
Full catalogue
Learners Leaderboard Classes/Grades Leaderboard Schools Leaderboard
Pricing Support
Help centre Contact us
Log in

We think you are located in United States. Is this correct?


Test yourself now

High marks in science are the key to your success and future plans. Test yourself and learn more on Siyavula Practice.

Sign up and test yourself

Chapter 16: Area and perimeter of 2D shapes

16.1 Introduction

Pi (\(\pi\)) is an irrational number. Expressed as a decimal number, it has an infinite number of decimals and no repeating pattern. Can you guess how many digits have been calculated for the value of \(\pi\)? In \(2021\), a supercomputer calculated \(\pi\) to \(\text{62,8}\) trillion decimal places!