How to Calculate Diameter

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Introduction: How to Calculate Diameter

We need, for example to produce some hemisphere with some diameter .
In order to fabricate a sheet metal workpiece the desired diameter, preferably to some simple calculations.

Step 1: For Example, We Make This Earring

We need to make a hemisphere with same diameter

Step 2:

Here we go, we have a formula

Step 3:

We make a calculation, it says that we need a workpiece diameter about 17mm

Step 4:

Now we have what we need. 

P.S.Sorry my english is awesome, I learning it.

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    4 Comments

    I think I could use some more explanation for this. Could you include the measurements you used and what the tool in the last picture is (just for curiousity's sake!)?

    I thought that the formula will be useful to artists, all for the sake of

    Sorry, I can not explain it more in English, tool, we call it 'anka':)