After taking gold in the halfpipe snowboarding event in each of the past two Olympics, American star Shaun White was in line to add some additional hardware to his trophy case with a medal in the new slopestyle event in Sochi...
Any point of an oval belongs to an arc with a constant radius (shorter or longer), but in an ellipse, the radius is continuously changing. In common speech. In common speech, oval means a shape rather like an egg or an ellipse, which may be two-dimensional or three-dimensional.
The shape determines what type of mark it is. 1  A square or rectangular shape is used for conveying instructions. 2  An open diamond shape signifies danger. 3  A diamond with a cross in it signifies an exclusion area that you may not enter. 4  A circle indicates an upcoming operating restriction, such as a speed limit.