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Message: <blockquote data-quote="Offtensive" data-source="post: 1115300" data-attributes="member: 416667">the method is pretty much spot on, but a slight overstatement for the 1.2m dish’s area. Assuming these dishes are all ellipses, you can use the following formula for areapi * height/2 * width/2(Which is also the formulae for the area of a circle, as that is a type of ellipse too)When comparing two different dishes, you can use the below as the pis (plural of pi) and 1/2s cancel out.height * width of dish 1/height * width of dish 2So for a 1.2m dish vs a 1m dish, it’ll be 44% bigger.1.2*1.2 / 1*1 = 1.44</blockquote>