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![Perimeter - Definition, Examples [with Video] - Teachoo Class 9 - Definition (and Quesitons)](https://cdn.teachoo.com/e99d7d7f-d214-4f73-81bd-44f24c0859da/slide3.jpg)
Perimeter Definition
Last updated at May 29, 2026 by Teachoo
Class 9
Chapter 6 Class 9 - Measuring Space: Perimeter and Area (Ganita Manjar
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Definition (and Quesitons)
- Perimeter of Different Shapes
- Perimeter of a Circle - C/D Ratio
- Pi is Irrational
- Length of an Arc of a Circle
- Problems, Puzzles, and Paradoxes on Perimeter
- Exercise Set 6.1
- Area of Square & Rectangle
- Area of a Parallelogram
- Area of a Triangle
- Heron's Formula
- Circumcircle and Incircle of a Triangle
- Brahmagupta’s Formula for the Area of a Cyclic 4-gon
- Squaring a Rectangle
- Exercise Set 6.2
Transcript
Perimeter Definition WHAT IS PERIMETER? Perimeter is the TOTAL DISTANCE around the OUTSIDE of a shape. And, how to measure perimeter? HOW TO MEASURE PERIMETER Think of it as walking the boundary or a fence around a yard! Let’s do some examples RECTANGLE 3 SQUARE 4 TRIANGLE Perimeter P Side 1 + Side 2 + Side 3REGULAR PENTAGON P = sum of all sides ( ) 5in
