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

You are not logged in.

#1 2014-02-03 14:00:39

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 17,124
Website

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 (2014-02-03 14:07:53)


'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'
'You made a human being happy! There is no further achievement.' -bobbym

Offline

#2 2014-02-05 11:45:40

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,535

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

Offline

#3 2014-02-05 13:37:34

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 17,124
Website

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'
'You made a human being happy! There is no further achievement.' -bobbym

Offline

Board footer

Powered by FluxBB