iPhone 5 corner radius?

Hi, I had a similar problem. The solution is as follows:

1. draw a rectangle with the outside dimensions

2. select one corner to model the rounding

3. draw a two horizontal lines parallel to the short side

a) first is 7.35mm from top edge

b) second is 11.60mm from top edge

4. draw a vertical line at 9.28mm from side edge

5. make an ark starting at intersection point of top edge and line from (4) and ending at first horizontal line (3a)

6. make an ark starting at ending point of previous point and intersection of side edge and 11.60 line (3b)

7. make first ark tangent to top edge

8. make first ark tangent to second ark

9. make second ark tangent to side edge

That should be all.

Image 1: a finished sketched of the described geometry.

If you have the dimensions of the rectangle, measuring the radius of each corner is a trivial exercise. There are many websites that describe the fundamentals of geometric tolerancing.

Carl, Do you have any links or exactly how to do it?
What you've posted is like answering a question with out answering anything. Thank you.

1. Draw an outline of the iPhone, connecting the lines at right angles.

2. Measure the diagonal.

3. Measure the diagonal of the actual iPhone.

The difference between the two measurements is equal to 2X the radius.

An easier method may be to Google "drawing of the iPhone 5". For example:

http://www.imore.com/iphone-5-fully-dimensioned-design-drawings-available-all-se e

Carl, I thought Apple designed the corner based on an elipse, not a circle. Even if it was based on a circle, how would you know that is the radius Apple used. I dont know the exact dimensions but I have used 9.16mm diameter and that seemed to be pretty close for 'non-essential' measurements.