So, corresponding sides and corresponding angles of congruent figures have the same measures. The measures of corresponding angles in similar figures are the same, but the measures of corresponding sides in similar figures are multiples of each other (i.e. they are proportional).
An industrial flywheel. A flywheel is a rotating mechanical device that is used to store rotational energy. Flywheels have an inertia called the moment of inertia and thus resist changes in rotational speed. The amount of energy stored in a flywheel is proportional to the square of its rotational speed. Energy is transferred to a flywheel by the application of a torque to it, thereby increasing its rotational speed, and hence its stored energy. Conversely, a flywheel releases stored energy by applying torque to a mechanical load, thereby decreasing the flywheel's rotational speed.
Shortcut Keys. Shortcut keys (sometimes erroneously referred to as accelerator keys or hot keys) are keys or key combinations that users can press for quick access to actions. Shortcut keys differ from access keys. Access keys are assigned to every control so that the user can use the keyboard to move through the UI quickly.