You can add numbers. Usually it doesn't really make sense to add points.
It is the locus of points such that the sum of their distance from two distinct fixed points is a constant.
http://en.wikipedia.org/wiki/Elipse
The term that best describes the set of all points in a plane for which the sum of the distances to two fixed points equals a certain constant is called an "ellipse." In this scenario, the two fixed points are referred to as the foci of the ellipse, and the constant must be greater than the distance between the two foci for the shape to exist.
The term that best describes the set of all points in a plane for which the sum of the distances to two fixed points equals a certain constant is called an "ellipse." In this geometric shape, the two fixed points are known as the foci, and the constant represents the total distance that remains constant for all points on the ellipse.
The term that best describes the set of all points in a plane for which the sum of the distances to two fixed points equals a certain constant is an "ellipse." In this context, the two fixed points are called the foci of the ellipse, and the constant represents the total distance from any point on the ellipse to these two foci. If the constant is less than the distance between the foci, no points will satisfy the condition, and if it equals the distance between the foci, the ellipse degenerates into a line segment connecting the two points.
It is the locus of points such that the sum of their distance from two distinct fixed points is a constant.
an ellipse.
http://en.wikipedia.org/wiki/Elipse
The term that best describes the set of all points in a plane for which the sum of the distances to two fixed points equals a certain constant is called an "ellipse." In this scenario, the two fixed points are referred to as the foci of the ellipse, and the constant must be greater than the distance between the two foci for the shape to exist.
The term that best describes the set of all points in a plane for which the sum of the distances to two fixed points equals a certain constant is called an "ellipse." In this geometric shape, the two fixed points are known as the foci, and the constant represents the total distance that remains constant for all points on the ellipse.
173, excluding the two end-points.
The set of all points in a plane for which the sum of the distances to two fixed points equals a certain constant. - APEX
The term that best describes the set of all points in a plane for which the sum of the distances to two fixed points equals a certain constant is an "ellipse." In this context, the two fixed points are called the foci of the ellipse, and the constant represents the total distance from any point on the ellipse to these two foci. If the constant is less than the distance between the foci, no points will satisfy the condition, and if it equals the distance between the foci, the ellipse degenerates into a line segment connecting the two points.
The locus of all points such that the sum of the distances from the point to two fixed points is a constant (in this case, 6 cm) is an ellipse. The two fixed points are called the foci of the ellipse. The total distance of 6 cm is the major axis length of the ellipse, indicating that the foci are separated by a distance less than 6 cm, ensuring that the ellipse is defined.
173, excluding the two end-points.
It is not possible to have a number such as 2.959.25 - with two decimal points!
Sounds like an elliptical to me.