Helicopters are sometimes known as "whirlybirds", but they're not really airplanes in the same sense. I believe what you're thinking of is actually the gyrocopter.
A coordinate plane is sometimes called Cartesian plane in honor of René Descartes. YOU ARE AN IDIOT
The coordinate plane is sometimes call the Cartesian plane because Rene Descartes is often credited with inventing the coordinate plane and so the coordinate plane is sometimes called the Cartesian plane,in his honor.
cuz it just is
x-y plane
yes. you cannot do it freely, but if you use EM radiation, or vacuums, you can. (airplanes and whirlybirds use vacuums) a whirlybird has a huge propeller on top, and when it sucks the air under it, over it is a vacuum. something has to fill this vacuum. thus, the whirlybird is the closest thing to this vacuum. whirlybird fills vacuum. helicopter is the new name for whirlybird. but when it was invented, it's name was whirlybird.
Commonly called the door, sometimes hatch
It is called Cartesian after Rene Descartes who invented it.
The cast of Whirlybird - 2008 includes: Catherina Kusch as Sophia Madeline Torem as Nova
It is sometimes called the pre-image.
The coordinate plane, sometimes called the Cartesian plane, was developed by Rene Descartes in 1637. Descartes was a French mathematician born in 1596.
Helicopter
Coordinate plane