If you are using a ruler and compass to draw something - for example, a perpendicular bisector of a line or ... to use the formula for Pythagoras’ theorem. If you are given the hypotenuse ...

If you are using a ruler and compass to draw something - for example, a perpendicular bisector of a line or ... to use the formula for Pythagoras’ theorem. If you are given the hypotenuse ...

There have previously been hints that planets on perpendicular, or polar, orbits around binary stars could exist: in theory, these orbits are stable, and planet-forming discs on polar orbits around ...