DaneApr 19, 2006 3:45:20 pm
I don't have a protractor and need to measure the angle of a part of a closet to add shlves to it. I have all 4 sides measured, but need to measure the angle of one non-square side.
Assume the left side is 90 degrees to the front and back...
Soth [Muninn and Myrddin]Apr 19, 2006 3:47:39 pm [NT]
DaneApr 19, 2006 3:50:44 pm
Back side = 27.5"
Left side = 30.5"
Front side = 36.5"
Angled side = 31"
I need the measurement for the angled part so I can tell the hardware peeps what degree to cut it at.
Left side = 30.5"
Front side = 36.5"
Angled side = 31"
I need the measurement for the angled part so I can tell the hardware peeps what degree to cut it at.
Soth [Muninn and Myrddin]Apr 19, 2006 3:52:15 pm [NT]
Soth [Muninn and Myrddin]Apr 19, 2006 3:53:00 pm [NT]
DaneApr 19, 2006 3:53:45 pm [NT]
anna.jpgApr 19, 2006 3:55:50 pm [NT]
DaneApr 19, 2006 3:57:39 pm [NT]
Soth [Muninn and Myrddin]Apr 19, 2006 4:01:37 pm [NT]
syr - excels in excellenceApr 19, 2006 3:57:58 pm
____
|../
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I think
|../
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I think
anna.jpgApr 19, 2006 3:58:52 pm
if the left is square to both back and front, then by cutting away the rectanglar part that is 27.5" wide, then you have a triangle on the right that is described as 9" on the front, 30.5" deep, and 31" on the hypotenuse (sp). The problem is that the 30.5 and 9" segments are at right angles to each other, so pythagoras says the hypo' needs to be rather longer than 31"
anna.jpgApr 19, 2006 4:03:35 pm
x marks right angles
<pre>
27.5 (back)
+------------------------+
|x /
| 30.5 /
| left / 31 right
| /
|x /
+------------------------------+
36.5 front
27.5 (back)
+------------------------+
|x x|/
| 30.5 | /
| left | / 31 right
| | /
|x x|x /
+------------------------+-----+
27.5 9
ok, just ran the math, I was a little wrong...
pythagoras says the 31 is more or less correct...
so... some sin and cos shit iirc. syr?
</pre>
<pre>
27.5 (back)
+------------------------+
|x /
| 30.5 /
| left / 31 right
| /
|x /
+------------------------------+
36.5 front
27.5 (back)
+------------------------+
|x x|/
| 30.5 | /
| left | / 31 right
| | /
|x x|x /
+------------------------+-----+
27.5 9
ok, just ran the math, I was a little wrong...
pythagoras says the 31 is more or less correct...
so... some sin and cos shit iirc. syr?
</pre>
Soth [Muninn and Myrddin]Apr 19, 2006 4:12:12 pm
sin theta = opposite/hypo
cos theta = adjacent/hypo
tan theta = opposite/adjacent
but the angles im getting seem to add up to ...like 93 degrees...not 180 lol
cos theta = adjacent/hypo
tan theta = opposite/adjacent
but the angles im getting seem to add up to ...like 93 degrees...not 180 lol
anna.jpgApr 19, 2006 4:13:08 pm [NT]
Soth [Muninn and Myrddin]Apr 19, 2006 4:16:56 pm [NT]
anna.jpgApr 19, 2006 4:18:29 pm
I'm sure there's some measurement slop in there, so should be able to get reasonably close to the angles he needs.
syr - excels in excellenceApr 19, 2006 4:22:42 pm [NT]
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