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**Hannibal lecter****Member**- Registered: 2016-02-11
- Posts: 392

In this YouTube link

https://youtu.be/6KPSmajeseI

He is talking about heron's proof

He is talking about scaling a traingle

Starting in minute 1:01

What is a traingle scaling and is there on MiF

Wisdom is a tree which grows in the heart and fruits on the tongue

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**Bob****Administrator**- Registered: 2010-06-20
- Posts: 10,475

Abot half way he gets to the formula

Then he takes the right angled triangle with shorter sides r and x, and enlarges it by a scale factor of yz so it becomes rxz by by xyz. He adds on other enlarged triangles.

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Sometimes I deliberately make mistakes, just to test you! …………….Bob

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**Hannibal lecter****Member**- Registered: 2016-02-11
- Posts: 392

Bob wrote:

Abot half way he gets to the formula

Then he takes the right angled triangle with shorter sides r and x, and enlarges it by a scale factor of yz so it becomes rxz by by xyz. He adds on other enlarged triangles.

Bob

why he enlarged the r and x by yz

What for?

And next step he enlarge the sides r and y by

z.(x^2+r^2)^1/2 Why exactly this equation?

Wisdom is a tree which grows in the heart and fruits on the tongue

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