How are polar curves used in everyday life?

For cooling down over-heated fliers.

To strike out an eskimo playing softball at the company picnic? To get
an Eskimo to run off the road?

Everyday life by everyday people? Figuring out areas. Mechanically
with a planimeter, or electronically with a computer program. DeLorme
or ESRI maps for instance.

To draw pictures. Cycloids, foliums, etc.

To present data that is directional. Wind speed and direction, sun angles.

If you have Excel, check out the graph displays for possible uses of polar curves.

To display field of vision. Both foveal and peripheral, horizontal as
well as vertical.

To display angle of arrival of noise or light.

To display some event using parameters, such as time. Lissajous patterns.

A television display could be considered a polar curve. The raster is
drawn with sawtooth sweeps. The beam is modified in three color
intesity as it sweeps the raster.

Computer vector displays, such as fonts can be developed point by
point or by short (polar curve) programs that draw lines. Check out
PAINT or DRAW or other graphics programs.

I do not know anyone that consciously uses polar curves in everyday
life. Perhaps there are Inuit baseball teams that use them.

The polar coordinate system is basically how one sees the world.  It
defines everything from one central location and uses angle and
distance to gauge something?s position.  We view the movement path of
the moon, sun and stars around the earth as polar curves.  The
Cartesian system is from an omnipotent perspective, while polar is
more objective.

When one draws art using perspective, polar curves are taken into
account.  Some extreme examples are found in the work of M.C. Escher.
On a 2 dimensional level I suppose one could site things like a
refreshing radar screen, perhaps contour maps as well.

We seem to use Cartesian coordinates and shapes more frequently in our
lives but I believe nature operates in polar.

-Frcatl