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#1 2006-06-08 12:19:48

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,534

Herons' Formula

Just finished a page on Heron's Formula (Area of a triangle from its sides). What do you think about it?


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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#2 2006-06-08 22:59:54

Ninja 101
Member
Registered: 2006-02-20
Posts: 936

Re: Herons' Formula

Hmm. that is very interesting and it may help me in my GCSEs in about a year's time.
up

Last edited by Ninja 101 (2006-06-08 23:00:11)


Chaos is found in greatest abundance wherever order is being saught. It always defeats order, because it is better organized.

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#3 2006-06-14 02:48:40

ganesh
Moderator
Registered: 2005-06-28
Posts: 13,253

Re: Herons' Formula

The page is very good.
The special case of
(i) an equilateral triangle and the simplified formula for area of such triangles and
(ii) isosceles right angled triangle may be added.


Character is who you are when no one is looking.

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#4 2006-06-14 04:16:39

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,562

Re: Herons' Formula

I expanded the equation for area by eliminating the s and just using a, b, and c, however, I must have made a mistake because when I enter the a=3, b=4, c=5 famous triangle for the sides, I don't get 1.5 like the original formula.
Infact, my square root goes negative inside, so a big boo-boo.
Here is my wrong equation:


igloo myrtilles fourmis

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#5 2006-06-15 00:15:32

Ninja 101
Member
Registered: 2006-02-20
Posts: 936

Re: Herons' Formula

I'm afraid you've lost me. what


Chaos is found in greatest abundance wherever order is being saught. It always defeats order, because it is better organized.

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#6 2006-07-23 07:12:36

Devantè
Real Member
Registered: 2006-07-14
Posts: 6,400

Re: Herons' Formula

Nice page. It'll probably come in handy when I do an exam. smile

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