I heart Polar Coordinates T-Shirt

Along with goldfish swallowing and ethanol poisioning, a student's first exposure to polar coordinates marks a traditional rite of passage in the undergraduate experience. For what could be more liberating than the realisation that one need not follow Cartesian norms? Passage into the r-theta realm reveals vistas with names the squares can't even spell. Limacon. Lemniscate. Lituus. Bifolium. Cochleoid. No wonder our high schools turn away the dump trucks full of money we send them to repair their crumbling math departments, lest impressionable teens be exposed to these dangerous and seductive geometries before their tender frontal lobes have fully developed. Also available for dark apparel. Customisable.