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#1 2015-09-05 19:52:41

bob bundy
Registered: 2010-06-20
Posts: 8,452

The Sine Rule

In any triangle ABC,

where R is the radius of the circumcircle.


If you are not yet familiar with the construction of a circumcircle and the angle properties of a circle, you are advised to look these up first.

The circumcircle … 40#p367140

Angle properties of a circle.
Posts 6 and 7


angle AOF = half angle AOB = ACB (using the angle props)


The rest follows by a  similar argument.


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 Bundy smile


#2 2016-04-25 18:53:52

Registered: 2016-04-16
Posts: 1,086

Re: The Sine Rule

Last edited by thickhead (2016-04-25 18:58:06)

{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}
(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha
{Gods rejoice at those places where ladies are respected.}


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