A diagonal is formed by the straight line that sets at an angle in place of straight up or across. If you draw a square and a line connecting the opposite corners, that is a diagonal line. The below given is the diagonal of octahedron formula to calculate the diagonal on your own. From the given diagonal formula it is obvious that finding the square root for the integer 2 and multiply the resultant value with the edge length would give you the diagonal measurement.

D = √(2) × a

Where,

D = Diagonal

A = Edge Length

Make use of the above diagonal of octahedron formula to determine the diagonal value of a given octahedron with the basic mathematical operations. Just replace the variable in the formula with the value and do the operation to get the result.