# Math/Angle help?

Discussion in 'Coop & Run - Design, Construction, & Maintenance' started by Oceanseve, Apr 19, 2009.

1. ### OceanseveSongster

May 23, 2008
Guthrie, OK
Okay I know I'm over thinking this, but humor me please?

We are doing a slanted roof, so how do I figure the other two angles for my right triangle? 4' 6" wide and 18" tall.

Last edited: Apr 19, 2009
2. ### new-rooScrambled

Oct 19, 2007
Quote:A right triangle has a 90 degree angle and 2 45 degree angles.

3. ### OceanseveSongster

May 23, 2008
Guthrie, OK
Its been a while since my last geo class, but I thought that was only if the two legs were equal.....

3,267
17
211
Feb 27, 2008
Russia, NY
5. ### new-rooScrambled

Oct 19, 2007
Quote:Right angle - Wikipedia, the free encyclopediaFeb 10, 2009 ... In geometry and trigonometry, a right angle is an angle of 90 degrees, corresponding to a quarter turn

If you have a right triangle then the legs must be the same

Last edited: Apr 19, 2009
6. ### domino7Songster

Jan 4, 2009
N.E. Ohio
Quote:Right angle - Wikipedia, the free encyclopediaFeb 10, 2009 ... In geometry and trigonometry, a right angle is an angle of 90 degrees, corresponding to a quarter turn

If you have a right angle then the legs must be the same

NOT TRUE

7. ### OceanseveSongster

May 23, 2008
Guthrie, OK
I don't trust anything off wiki

redoak - THANK YOU!!

Last edited: Apr 19, 2009
8. ### new-rooScrambled

Oct 19, 2007
Quote:Right angle - Wikipedia, the free encyclopediaFeb 10, 2009 ... In geometry and trigonometry, a right angle is an angle of 90 degrees, corresponding to a quarter turn

If you have a right angle then the legs must be the same

NOT TRUE

Too quick, I edited a right triagle has equal lengths in post above.

9. ### OceanseveSongster

May 23, 2008
Guthrie, OK
Redoak - thanks again. I have to admit it makes me proud, the math I did before you posted that is almost dead on I still got it

10. ### russ_tIn the Brooder

41
0
32
Jan 6, 2009
Taylor, Texas
rise/run = tan(x)
so
18/54 = tan(x)
x = atan(0.333) = 18.43