Question

A room is elliptical. If it is 20 feet long (horizontally) and 18 feet wide (vertically), how far apart would two people be if they are standing at the foci?

Answer 1

20^2 = 18^2 + foci^2

solve for foci and double it :)

Answer 2

oh.... and use the right numbers lol; 10 and 9

Answer 3

i get 8.718 abt :)

Answer 4

\[2\sqrt{(20/2)^2 - (18/2)^2}=distance\]