because the airfoil shape makes tiny air molecules at the bottom slow down and the top speed up. The engine just pushes the plane.
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They can stay up longer, fly faster and further, and are usually much bigger.
Well, honey, in a square, you've got four sides, so you'll need four planes to match each side. Unless you want to get fancy and start stacking them on top of each other, then the sky's the limit!
Two planes intersect at a line. The line where they intersect pertains to both planes. In the same manner, if infinitely many planes intersect each other at the same line, then that line pertains to the infinitely many planes.
there is 9 planes of symmetry in a cube
There are 31 planes of existence in Buddhist belief