The formula to calculate the constant sum of an ellipse is:
\[ S = 2a \]
Where:
The constant sum of an ellipse refers to the property that the sum of the distances from any point on the ellipse to the two foci is constant. This constant sum is equal to the length of the major axis of the ellipse. The major axis is the longest diameter of the ellipse, passing through its center and both foci. This property is fundamental to the definition of an ellipse and is used in various applications, including astronomy, engineering, and physics.
Let's assume the following value:
Step 1: Multiply the semi-major axis length by 2:
\[ S = 2 \times 5 = 10 \]
Therefore, the constant sum is 10.