Math Definitions - Letter P


Definition of Principal

Definition of Principal

The principal is the amount you initially invest (or borrow), not including any interest, dividends or bonuses.

For example, if Sam originally takes out a loan of \(\$2,000\) from the bank, the principal is \(\$2,000\).

He needs to repay the bank the principal, plus any interest.


The aim of this dictionary is to provide definitions to common mathematical terms. Students learn a new math skill every week at school, sometimes just before they start a new skill, if they want to look at what a specific term means, this is where this dictionary will become handy and a go-to guide for a student.


Year 1 to Year 12 students

Learning Objectives

Learn common math terms starting with letter P

Author: Subject Coach
Added on: 6th Feb 2018

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