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02-18-2010, 09:59 AM
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#1
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Member
Join Date: Dec 2009
Location: Columbus, OH
Posts: 281
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How do I calculate this angle?
I have a 2x12 that I need to cut a 22.5 degree angle in. It has to start from 3-3/4" in from the top end, but how do I know how far I need to mark it down the side (see pic)? Thanks!
JP
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02-18-2010, 10:16 AM
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#2
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Member
Join Date: Sep 2007
Location: Springville, NY
Posts: 1,232
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How do I calculate this angle?
I don't have a scientific calculator here, but to figure it out 3.75 multiplied by the tangent of 22.5° will give you the height. I drew it up and it is 1.553" or 1-9/16".
__________________
What we've got here is... failure to communicate. Some men you just can't reach. So you get what we had here last week, which is the way he wants it... well, he gets it.
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02-18-2010, 11:02 AM
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#3
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Member
Join Date: Dec 2009
Location: Canadian Rockies
Posts: 1,280
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How do I calculate this angle?
A 5-12 pitch works out to 22.6195 degrees.
Is that close enough?
I calculate the length as 1 35/64ths.
__________________
Quote:
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Go ahead and apply for a variance, those guys at City Hall can use a good laugh.
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02-18-2010, 11:04 AM
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#4
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Member
Join Date: Dec 2009
Location: Columbus, OH
Posts: 281
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How do I calculate this angle?
Quote:
Originally Posted by jlhaslip
A 5-12 pitch works out to 22.6195 degrees.
Is that close enough?
I calculate the length as 1 35/64ths.
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Now that's what I'm talkin' about jlhaslip! Kick ass! Although, I don't think my tape measure has 35/64th marks. How do I mark it? Thanks!
JP
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02-18-2010, 01:08 PM
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#5
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Household Handyman
Join Date: Feb 2009
Location: Albany, Ga.
Posts: 2,209
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How do I calculate this angle?
s.w.a.g. ?
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02-18-2010, 01:09 PM
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#6
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Member
Join Date: Dec 2009
Location: Columbus, OH
Posts: 281
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How do I calculate this angle?
Quote:
Originally Posted by Thurman
s.w.a.g. ?
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What is that?
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02-18-2010, 01:31 PM
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#7
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Tool Geek
Join Date: Jun 2008
Location: Pacific Palisades CA
Posts: 2,444
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How do I calculate this angle?
Quote:
Originally Posted by jpearson311
What is that?
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http://www.acronymfinder.com/SWAG.html
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& Stay Safe
.....Bob Lavery
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02-18-2010, 01:33 PM
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#8
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Member
Join Date: Dec 2009
Location: Columbus, OH
Posts: 281
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How do I calculate this angle?
Quote:
Originally Posted by palibob
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lolololololol!
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02-18-2010, 01:37 PM
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#9
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Member
Join Date: Jul 2009
Posts: 122
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How do I calculate this angle?
1.55330086" from the top. any more places you can figure it out.
6th grade math?? J/K
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02-18-2010, 01:38 PM
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#10
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Member
Join Date: Dec 2009
Location: Columbus, OH
Posts: 281
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How do I calculate this angle?
Quote:
Originally Posted by baum
1.55330086" from the top. any more places you can figure it out.
6th grade math?? J/K
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Thanks. It's been a while since I've worked with tangents. 
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02-18-2010, 01:48 PM
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#11
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Member
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,729
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How do I calculate this angle?
A regular corner is 90 degrees (a right angle). Divide it in half as if you were cutting a pizza or a cake. Divide each half in half* to get 22-1/2 degree slices. If you made a cardboard jig like this, would that help you measure?
Swag -- Refers to a light fixture hung from the ceiling where the power cord or cable is strung along the ceiling and then down the wall if needed to reach a receptacle.
* Easier to eyeball it equally compared with dividing the 90 degree angle into 4 parts all at once.
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The disadvantages of crab apple trees. In summer, the apples are too sour to pick and eat. In winter the birds come and leave dropping all over the place.
Last edited by AllanJ; 02-18-2010 at 01:53 PM.
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02-18-2010, 01:49 PM
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#12
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Member
Join Date: Dec 2009
Location: Columbus, OH
Posts: 281
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How do I calculate this angle?
Quote:
Originally Posted by AllanJ
A regular corner is 90 degrees. Divide it in half as if you were cutting a pizza or a cake. Divide each half in half to get 22-1/2 degree slivers. If you made a cardboard jig like this, would that help you measure?
Swag -- Refers to a light fixture hung from the ceiling where the power cord or cable is strung along the ceiling and then down the wall if needed to reach a receptacle.
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Actually I just made a paper jig not cardboard. Thanks! I'm new to this forum, but everyone on here is so quick and helpful.
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02-18-2010, 05:46 PM
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#13
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Member
Join Date: Dec 2009
Location: Canadian Rockies
Posts: 1,280
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How do I calculate this angle?
S.cientific W.ild A.ss G.uess
__________________
Quote:
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Go ahead and apply for a variance, those guys at City Hall can use a good laugh.
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02-18-2010, 06:11 PM
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#14
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Member
Join Date: Nov 2009
Location: central virginia mountains
Posts: 1,857
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How do I calculate this angle?
buy a protractor
__________________
The older I get the better I was
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02-18-2010, 06:33 PM
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#15
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"Beam me up, Scottie"
Join Date: Nov 2009
Location: Omaha, Ne.
Posts: 194
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How do I calculate this angle?
Buy a speed square. So easy a caveman can use it.!
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