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)
The order of rotational symmetry is the number of times the shape maps onto itself during a rotation of 360Â°. e.g. A rectangle has order of rotational symmetry of 2. 180Â° and 360Â° rotations will map it onto itself. A regular hexagon has order of rotational symmetry of 6. A scalene triangle, with no equal sides or angles has order of rotational symmetry of 1. All figures have an order of rotational symmetry of at least 1.