Rotation. In this animated Math Shorts video from the Utah Education Network, learn about rotation, which describes how a geometric shape turns around a point, called the center of rotation. When a geometric shape rotates on a coordinate plane, it stays exactly the same distance from the center of rotation.
Which birth control methods also protect against sexually transmitted infections (STIs)? The male latex or polyurethane condom gives the best protection against STIs. The female condom provides some protection. With all other methods, you also should use a male or female condom to protect against STIs.
Universal precautions are the most effective way to ensure that the risk of HIV infection is minimised. The principle is the same as that of safer sex, where universal precautions such as condoms are far more effective at reducing risk than subjective methods such as 'choosing carefully'.