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Forum topic by HopelessDad posted 12-04-2020 05:55 PM 216 views 0 times favorited 4 replies Add to Favorites Watch
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HopelessDad

2 posts in 55 days


12-04-2020 05:55 PM

Topic tags/keywords: question

Hello everyone,

I’m pretty new to wood working. I bought a Legend of Zelda themed Triforce Tree Topper to go with some custom ornaments my son and I are making this year. But the topper left a LOT to be desired. So I thought, how hard would it be to build this thing out of wood? Couldn’t be too tough…

Well, I got my dad’s miter saw out today and boy, those angles have me scratching my head. Initially, I thought the two pieces of wood making the left and right sides of the triangle (3/8in thick, 2 1/2 inches wide, and 11 inches long) just needed shallow angled cuts. So I put 33 degree cuts on each side and figured it’d create my 66 degree angle. But it didn’t seem to work.

So I found you guys and I was hoping someone can help me determine what my angles need to be on each of these pieces.

I appreciate the help in advance!

The end-goal for this topper is that those bright yellow triangle pieces are actually going to be translucent yellow acrylic sheets and the inside edges of the frame will have LED light strips. My light strips are battery powered, so the black inner triangle will be a thin, removable piece, black piece of acrylic that allows me to access the battery box to change said batteries. The whole thing is made to be wireless because our tree is one of those that has a motorized base and we want the tree to spin. (Another reason I didn’t like the Gamestop topper, it’s wired and cheaply made, so my initial plan of cutting it open and replacing the innards didn’t go very well.)

https://i.imgur.com/0iDQ7n9.png

^ Link to full-sized image.


4 replies so far

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torus

518 posts in 1389 days


#1 posted 12-04-2020 07:02 PM

It is hard to see on the picture, but 66+66+66 will give you 198 degrees.
The sum of angles i the triangle (any triangle!) is 180 degrees!

So if your triangle has all sides equal then all your angle should be 180/3=60 degrees.
And your miter saw should be set to 30 degrees (60/2).

Sorry if I am saying obvious – the picture is not readable to me

-- "It's getting better..." - put this on my RIP stone!

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MrUnix

8361 posts in 3175 days


#2 posted 12-04-2020 07:16 PM

+1 on 60 degree angles if it’s an equilateral triangle. Can’t really tell from the image.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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LesB

2798 posts in 4419 days


#3 posted 12-04-2020 07:16 PM

So is there some reason the two bottom inside angles are 57 degrees and top one is 66? That does add up to 180 so it should work. For the cuts just set the saw for 1/2 of those angles….28.5 and 33 respectively.

Or as Torus cited above use three 60 degree angles. That will make it easier to fit your acrylic panels also as they will be symetrical.

-- Les B, Oregon

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HopelessDad

2 posts in 55 days


#4 posted 12-04-2020 08:07 PM



So is there some reason the two bottom inside angles are 57 degrees and top one is 66? That does add up to 180 so it should work. For the cuts just set the saw for 1/2 of those angles….28.5 and 33 respectively.

Or as Torus cited above use three 60 degree angles. That will make it easier to fit your acrylic panels also as they will be symetrical.

- LesB

Zelda’s “Triforce” isn’t an equilateral triangle, it’s slightly taller than it is wide. So unfortunately, that skews the dimensions a slight bit and complicates it. Normally, I’m not the type to be a perfectionist for design or anything, so I would go with what’s easiest. But when I rendered it as an equilateral triangle, I found that it just looked off from what I remember from the games and it bugs the heck out of me.

So I just set the saw to 33 for the cut? Because I did try that at first, and unless I did something wrong, the angle was far too shallow and the triangle’s top point was obtuse when it should have been more acute. Is there some difference when you’re cutting the angles on the edge (the part that’s 3/8s of an inch thick as opposed to the front of the board that’s 2 1/2 inches wide).

If not, it’s possible I just messed something up myself.

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