Having thought about it, how do you apply the rule of thirds to a plate? I've considered the following....
1...divide the diameter by 3 and make the bowl two thirds and the rim one third. Thus, for a 30cm plate, the bowl would be 20cm wide and the rim 10cm. However, this poses a problem, because on any line drawn through the centre of the plate, we see the bowl once and the rim twice, so the rim would need to be 5cm wide to maths the maths work - 5cm rim + 20cm bowl + 5cm rim = 30cm
2...divide the radius by 3 and make the radius of the bowl two thirds and the width of the rim one third. thus, for the same size bowl as used above (in example 1), the bowl would have a 10cm radius ( which makes the bowl 20cm wide) and the rim would be 5 cm wide. This results in the bowl appearing to be 4 times the width of the rim.
I'm confused! Help!