Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

You are not logged in.

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

MathsIsFun
Registered: 2005-01-21
Posts: 7,685

### 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

Offline

## #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.

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.

Offline

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

ganesh
Registered: 2005-06-28
Posts: 24,651

### 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.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,588

### 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

Offline

## #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.

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

Offline

## #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.

Offline