Reading the formulas

Simon has made a table of how to calculate the areas of various shapes. The ellipse one made him especially happy:

πr x h/2

Which one is r, I asked, and which one is h? Is h the longer line? – It doesn’t matter, Mom, because you divide them both by two in the end, Simon said. That’s funny how he sees those things earlier than I.

And in a circle, the radius and the hight divided by two is the same! – he added in English.


Earlier the same day:

Neva shouts: Mom, the film was first 2D and then all of a sudden 3D!

Simon: No, it was first πr² and then it became 4πr²!


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