I'm building a box for my subwoofers and its wedge shaped. How to I calculate what angle to cut the hypotenuse so it lays flat on the other sides?
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Where the 1 is on the "diagram", i need to calculate what angle to bevel the front board.
Thanks for your help!

 

i've built my own box too. but i don't know what youre asking. so if you could elaborate or explain better, maybe with pictures. i could help you out. i could show you a picture of mine but i dont know how to put pictures on this.

 

Use an angle Gage, [protractor] [$2 or so at any office supply store] then divide in half and cut each pc. with that angle, it looks to be about 40 degrees so you would cut a 20 degree angle on each pc. so when they go together you will have 40 degrees. BTW I would also cut that angle, [40 degree] onto a 2" x length of inside of box x whatever thickens of MDF you are using, to use as a brace along that seam inside the box. 94

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Orpheus1985 &raquo;</TD></TR><TR><TD CLASS="quote">I'm building a box for my subwoofers and its wedge shaped. How to I calculate what angle to cut the hypotenuse so it lays flat on the other sides?
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|.............\ 1
|________|

Where the 1 is on the "diagram", i need to calculate what angle to bevel the front board.
Thanks for your help! </TD></TR></TABLE>

Why aren't you doing a design more like this:
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It would make it 10 times easier to make and easier to calculate/cut.
Then you could do this:

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|__|_____.\ which makes it a triangle that is easy to calculate...removing the back part of the box from the equation makes this:

2
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Now to get the angle to cut the boards at, you want to get angle #2. This will give you the angle to cut the frontplate's edges at. (Because if it is a very steep front you will cut less of an angle off, and if it's a very elongated front you will cut at a wider angle.)

To get #2, you will now use some trig: tan^(-1) (width / height) = the angle at #2.
To get the width for above, simply take the total width at the bottom, and subtract the total width at the top. The height is just the height of the box. You have a scientific calculator on your computer so using that will give you the angle.

Good luck, give us actual dimensions if you need more assistance.

Oh, and PS: you always want to cut the frontplate's edges and leave the rest of the enclosure as is. Using slashes, the crossection of the frontplate should look like this when cut:
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