How to flatten a circle

Hi,
I'm afraid I only have SolidWorks2015 so cannot do this. Below is a tutorial of how to do this though :)
Cheers,
Shaun
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Step 1:
Change the circle you have drawn to a 3 point arc with lines relating it to the centrepoint
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Step 2:
Dimension the two ends of the circle to be 0.001mm from the top centre
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Step 3:
Flatten the profile
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Step 4:
You could then add extrudes/cuts to get your profile onto either end. It is not the best way to do it- you cannot fold the profile with these features, but it is the only way I can see how to do it at the moment!