Octagon Side Length Calculator From Diameter. To calculate the volume of an octagon shaped slab you need to provide the length of one of these sides and the required depth of the slab. The distance from each vertex is a + x, where a is the length of the side of the octagon and x is the length of the leg of the isosceles right triangle that is cut off of each corner of the square, but x + a is half of the diagonal of the square.
Just enter one side and the rest of them will be calculated so you have the whole layout. Suppose that each side has length s. Since you know that s = 60 feet all that remains is to find x.
Area of an octagon = \(2a^{2}(1+\sqrt{2})\) formula for perimeter of an octagon:
An octagon can have two types of diameters. A regular octagon is a shape with 8 even sides and 8 internal angles of 135 degrees, adding up to a total of 1080 degrees. Calculate the area and perimeter of a regular octagon. Octagon shaped volume calculators in a regular octagon there are eight straight, equal length sides and eight inside corners that total 135°.
