Question Detail
Question
According to the document, an ellipse can be traced by a point moving such that the sum of its distance from two fixed points (foci) is constant and equal to what?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Page 5 states: 'An ellipse is a curve traced by a point moving such that the sum of its distance from the two fixed points, foci, is constant and equal to the major axis.' The formula also shows PF1 + PF2 = AB (Major axis).
Hint
Look at the definition of an ellipse at the beginning of the 'ELLIPSE' section on page 5.