It is called its bounds. In the case of 2 dimensional objects, it is part of the perimeter.
It is called its bounds. In the case of 2 dimensional objects, it is part of the perimeter.
The outer edge means the furthest most point from the center. The outer edge is usually the end of the object before the dropping off point.
Perimeter
The outer edge of a circle is called the circumference.
Its perimeter
outline
outline
The out edge of a cup is called the 'Rim'.
brim
circumference
A straight line from the center of a circle to the outer edge is called a radius.
The perimeter