Question

Find the constant sum for an ellipse with foci F1 (3, 0), F2 (24, 0) and the point on the ellipse (9, 8). The constant sum is: _____. Enter only a number.

Answer 1

@skullpatrol

Answer 2

we know that the distance 2a is the constant sum

Answer 3

yes

Answer 4

ok you can use the distance formula

Answer 5

lets call the point (9,8) , point P

Answer 6

constant sum = distance (P, F1) + distance (P, F2)

Answer 7

ok

Answer 8

ok

Answer 9

hmm

Answer 10

think of F1 and F2 as thumbtacks that hold down a string (with some slack) and then draw out an ellipse