Hypocycloid
Excel for artists… –

Sometimes, you don’t need complicated stuff to get beautiful images. Sometimes it’s easily done. Today’s Math Art was generated on Microsoft Excel. Yes, you read that right. Microsoft Excel…. Remember those spirographs that you played with when you were a kid? If you’ve ever drawn using a spirograph, you’ve drawn a hypocycloid. A hypocycloid is a roulette of two circles, where the one being drawn on is the one inside (think the spirograph). If the outer circle is the one being drawn it’s called a epicycloid. The variable that defines the shape of the hypocycloid is the radii of both circles.

Math Art | Gallery of Mathematical Art » Spiral Star – [via] Link.

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Excel drawings – Link.