1. Begin by lightly sketching an approximated square.

2. Join the opposing corners together to find the centre of the square. 

3. Using the centre of the square, divide the square into quarters. The intersection of these dividing lines with the main square will show the point of tangency between the square and curve. 

4. The curve will also pass at roughly two thirds of the distance from the centre to any of the corners. Sketch 4 shows that point B is two thirds of the distance between points A and O. You now have eight points on the curve of a full circle. 

5. Using the points lightly sketch a circle. 

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