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

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## #1 2014-02-04 13:00:39

Agnishom
Real Member

Online

### Area of triangles without right triangles

http://www.mathsisfun.com/algebra/trig- … angle.html

Wonderful page, indeed!

BTW, Please include this formula too:

Last edited by Agnishom (2014-02-04 13:07:53)

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'The whole person changes, why can't a habit?' -Alokananda

## #2 2014-02-06 10:45:40

MathsIsFun

Offline

### Re: Area of triangles without right triangles

Isn't sin(A)/2 easier than sin(A/2)cos(A/2) ?

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

## #3 2014-02-06 12:37:34

Agnishom
Real Member

Online

### Re: Area of triangles without right triangles

It is but then high school children do not always know the T-ratios of obtuse angles.

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'The whole person changes, why can't a habit?' -Alokananda