So with any shape look at how many sides you have (for octagon 8 ) and divide 360 by the number of sides (360 degrees makes a complete "trip" around from starting point to end point). 360/8=45.
Next since we are likely wanting to angle the ends of each side, two ends will make up that 45 degree angle. So you divide 45 by 2 = 22.5 degrees.
So to summarize,
Octagon - 360/8 sides/2 = 22.5 degrees
Hexagon - 360/6 sides/2 = 30 degrees
Square - 360/4 sides/2 = 45 degrees
Each exterior angle is 45 degrees (interior angle = 135 degrees).
There is too much extra needed information before an answer can be given. Is the wood to make only the circumference, or would it make all the surface, what is the width of the wood, what design to make the octagon.
To create a regular dodecagon (12-sided polygon) with wood, you need to make a degree cut of 30 degrees. This is because the internal angles of a dodecagon are each 150 degrees, and the exterior angles are 30 degrees (360 degrees divided by 12 sides). You can use this angle to cut the wood accurately for each of the 12 edges.
oak or verlen wood
wood ,string
To cut a 45-degree angle on a piece of wood, you can use a miter saw or a miter box with a handsaw. Measure and mark the angle on the wood, then align the saw blade to cut along the marked line at a 45-degree angle. Make sure to wear safety goggles and follow proper safety precautions when cutting the wood.
To accurately cut a 45-degree angle with a table saw, you need to adjust the saw blade to a 45-degree angle using the bevel adjustment on the saw. Then, use a miter gauge or a miter sled to guide the wood through the saw at the correct angle. Make sure to measure and mark the wood accurately before cutting to ensure precision.
8 degree hardwood 11 degree soft wood with a degree to play with
Ebenezer Wood constructed the first hexagon and octagon shaped cases for pencils in 1880
Ebenezer Wood constructed the first hexagon and octagon shaped cases for pencils in 1880
to make an quilateral hexagon (all the angles identical) each internal angle should be 108 degrees.
all you need is a pice of wood and two pices of smaller wood