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![Trairasika - The Rule of Three [Class 8 Chapter 7 Ganita Prakash] - Trairasika—The Rule of Three](https://cdn.teachoo.com/d9af578b-667c-4958-b4b2-704c75ed4a10/slide71.jpg)
Trairasika—The Rule of Three
Last updated at January 15, 2026 by Teachoo
Class 8 (Ganita Prakash - 1, 2 & Old NCERT)
Chapter 7 Class 8 - Proportional Reasoning-1(Ganita Prakash)
- Observing Similarity in Change
- Basic Definitions
- Problem Solving with Proportional Reasoning
- Figure it out - Page 165-167
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Trairasika—The Rule of Three
- Figure it out - Page 170-171
- Acitvity and Question - Page 171
- Sharing, but Not Equally!
- Figure it out - Page 175
- Unit Conversion
- Figure it out - Page 176, 177
Transcript
Trairasika—The Rule of ThreeTrairāśika is the Sanskrit term used by Indian astronomers and mathematicians of the pre-modern era to denote what is known as the "rule of three" in elementary mathematics and algebra. It basically means If 𝒂/𝒃=𝒄/𝒅 Then 𝐚=𝒃𝒄/𝒅 Basically, if three values are given, we can find the fourth value We can use this Rule for Ratios which are Proportional Let’s do some examples
