Help for the math impaired

[MikeMcCoy]

Would someone care to bail me out again? I'm making a flag box and can't figure out the angle to cut the miters. The box is of course triangular shaped with a base of 21 inches and the sides 14 inches. I could swallow my pride and keep doing trial and error but I'm running out of scrap so I thought I'd ask more expert help.

[gad5264]

check this out

http://www.csgnetwork.com/sawmitercalc.html

[LarryG]

I'm assuming you want the corners mitered. Also that all three pieces are the same thickness.

If Yes to both, the 90deg corner where the two 14" sides connect will be a typical 45deg miter cut on each piece (of course).

At the remaining two corners, the angle formed is 45deg, so each piece will be cut to 22-1/2deg.

BTW, by my calculations the 21" leg will actually need to be about 19-13/16"

[MikeMcCoy]

Thanks you folks

[atgcpaul]

http://wright.nasa.gov/airplane/trig.html

Don't worry, I had to look it myself and I used to be
DA BOMB at math....in high school. This helped jog the
memory.


-Paul

[scmhogg]

Mike,

Wood Magazine, Issue 144, had a flag case plan that I made for a friend. It allows you to use only 45 degree angles. I was very pleased with the way it turned out.

I can scan a copy for you if you don't have that issue.

Steve

[scmhogg]

Ask and ye shall receive.

Images deleted.

Steve

[LarryG]

Um, I really dislike playing self-appointed Internet Police, but copyrighted material should not be posted to a public discussion forum. It's not fair to our host Sam Conder to expose him to that kind of liability.

[TJG]

Good catch on the copyright. Use these links instead to purchase the plans or the magazine.

The same plans as above, can be purchased here (download for $5.95):
http://store.woodstore.net/flagcase.html

The entire magazine issue can be purchased here for $7.95 (scroll to bottom of page to buy):
http://store.woodstore.net/is144oc20.html

[JR]

... copyrighted material should not be posted to a public discussion forum...

Good point, Larry.

Steve, I'm sure you'd like to get up to speed on the fast-growing field of IP law, but this could be a real crash course!

JR

[MikeMcCoy]

Thanks Steve - Have the magazine but forgot all about it.

[scmhogg]

I'm sorry about posting the plans. I'm a lawyer and didn't even think about a possible copyright violation. Not smart.

I have deleted the plans.

Steve