Sire, there is no royal road to geometry.
A prime number is one (which is) measured by a unit alone.
A line is length without breadth.
Better balance, less pain and less restless leg syndrome.
And the whole is greater than the part.
That, if a straight line falling on two straight lines makes the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which the angles are less than two right angles.