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Help Me Figure Out Angles. Pic Inside


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Angles are one of those things I have always had problems with. So I drew a picture in paint and circled the angle I need help with. How would I find the angle of that so I can cut it and make it flush with the face??

Untitled-1.jpg

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Oh shit that's math. Easiest thing is to use a protractor. Or better yet model it in goggle sketchup. Then measure the angle. It'll be very exact.

That's the easiest way.

Or you can do maths... Maths is funner.

-Ignore any "outside lines" so you're left with just the trapezoid shown below.

TRAPEZOID.png

-Measure the bottom line. We'll call this number X.

-Measure the slanted line (the top). We'll call this Y. (The units don't matter, as long as they are the same as the above step.)

-Go to windows calculator. Got to View > Scientific. Make sure "Degrees" is selected (top left).

-Type in X/Y (for example: 24/28.6). Hit enter to get the quotient.

-Click on Inv (right under degrees).

-Click on Sin-1 (down and to the left of Inv).

-Your answer should appear. This is the inside angle of the top left corner.

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