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# Need help figuring out angles of a planter box

#1
05-01-10, 07:38 PM
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Join Date: Oct 2006
Location: United States
Posts: 106
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Need help figuring out angles of a planter box

This is a polygon I think. It has 2 sides that are 9' and one end is 4' and the other is 8'. So it is shaped somewhat like this:
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So can anyone tell me how to figure out what I should cut the angles at?
Thanks for your time Beer 4U2

#2
05-01-10, 11:49 PM
Member
Join Date: Feb 2010
Location: Mesilla, NM
Posts: 103
I believe it is a isosceles trapezoid, not sure what the equation is but if my 14 year old was awake she would probably laugh at me than tell me. But you could use a t-bevel to get the angle. Set that on your miter saw if you have one and that would give you the angle. You could also just trace or draw it on cardboard, thin plywood, or scrap wood.

Try here: isosceles trapezoid calculator

#3
05-01-10, 11:54 PM
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Join Date: Oct 2006
Location: United States
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Thanks but it's 9 feet in length and though I have the pieces generally cut it is really hard to lay out accurately so therefore just want to go by the angle.

#4
05-02-10, 12:11 AM
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Join Date: Feb 2010
Location: Mesilla, NM
Posts: 103
Use the isosceles trapezoid Calculator than split the angle you get in half and that is the angle you would cut your wood at. So if it is 98 degrees than you would cut your wood at 49 degrees. Hope that helps.

#5
05-02-10, 10:56 AM
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Join Date: Oct 2006
Location: United States
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That is a great link! Thanks, that did it. Off to make that planter and my wife will be happy