Itâs a cost-benefit analysis: If it costs you 3 hours weekly to do the wash, but costs you $30 to send it out â that is $10 per hour. But if you bill more than that at your business â or stand to get a raise if you use those three hours to learn new skills, earn a degree, etc., it is worth the investment.
Coordinate Rules for Rotations. In general, we can state the following coordinate rules for (counterclockwise) rotations about the origin: For a rotation of 90o: (x, y) --> (ây, x) For a rotation of 180o: (x, y) --> (âx, ây) For a rotation of 270o: (x, y) --> (y, âx)
For example, if we have a Square and we have to rotate it 90 degrees, every time we get the same square. We can find this, 90 degrees by dividing 360 degrees by 4 because 4 sides are present in a square. And we can say that, the rotational symmetry of a square is at every 90 degrees. In a pentagon 5 sides are present so the rotational symmetry is 360 / 5 = 72 degrees. In a Hexagon 6 sides are present so the has rotational symmetry is 360 / 6 = 60 degrees. In a heptagon 7 sides are present so it has rotational symmetry as 360/7 = 51.4 degrees. In an octagon 8 sides are present and it has rotational symmetry as 360/8 = 45 degrees. This is all about rotational symmetry of different polygons.