How to calculate the angle of the triangle?

[JakubST]

Hi.

 

I know values of a and b.

How to calculate the value of angle Alpha?

$tangent_alpha = tan(a/b);
$alpha = ????? 

 

 

Regards!

Edited July 2, 2013 by JakubST

[ginerjm]

For this exercise, this has to be a right triangle, correct?  Therefore the other two angles have to be 30 & 60.   Take it from there.

 

And find a 10th grade math forum for more help

[JakubST]

This is right triangle like on a drawing.

 

 

Therefore the other two angles have to be 30 & 60.

 

Not true.

 

And find a 10th grade math forum for more help

 

Really very usefull answer

Edited July 2, 2013 by JakubST

[JakubST]

For other then ginerjm:

$alpha = rad2deg(atan($a/$b));  //alpha in degrees

[Barand]

For this exercise, this has to be a right triangle, correct?  Therefore the other two angles have to be 30 & 60.   Take it from there.

 

 

 

And find a 10th grade math forum for more help

gingerjm, you really should take your own advice

[ginerjm]

You know - you are absolutely correct.  I'm going to leave this site.  Too frustrated by the caliber of people's attitudes towards teaching themselves something instead of seeking work done by others.

 

Thought I could be of help here, but instead my own principles have made me come across badly here.  This topic exemplifies that totally.  I apologize to those reading this topic for my off-the-cuff response here.  (Can you believe I was a math major 40 years ago?)

 

Good luck to all you newbies.