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![Ratio of Perimeter to Side - [Chapter 3 Class 9 Ganita Manjari Part 1] - Perimeter of Different Shapes](https://cdn.teachoo.com/b9be67d2-98b5-4887-9afc-eba8e708dfb7/slide17.jpg)
Ratio of Perimeter to Side
Last updated at May 29, 2026 by Teachoo
Perimeter of Different Shapes
Class 9
Chapter 6 Class 9 - Measuring Space: Perimeter and Area (Ganita Manjar
- 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
- Area of a circle
- Exercise Set 6.3
- End-of-Chapter Exercises
Transcript
Ratio of Perimeter to Side Let’s look at Ratio of Perimeter to Side of Common Figures SQUARE (REGULAR) erimeter mple: , Ratio . 2 EQUILATERAL TRIANGLE (REGULAR) Perimeter Ratio Ratio Example: , Ratio . 3 REGULAR PENTAGON Perimeter (P) =5s Ratio Ratio Example: , Ratio .There is a special case though – Circle No matter how big a circle is, the Ratio of 𝑪𝒊𝒓𝒄𝒖𝒎𝒇𝒆𝒓𝒆𝒏𝒄𝒆/𝑫𝒊𝒂𝒎𝒆𝒕𝒆𝒓 is same I SPECIAL CASE: THE CIRCLE Circumference or Note: For a circle, the boundary is compared to its diameter, not a side. Value:
