Question 830405
ellipse
foci | (-10, -7)  |  (6, -7)
vertices | (-12, -7)  |  (8, -7)
center | (-2, -7)
semimajor axis length | 10
semiminor axis length | 6
area | 60 pi~~188.496
perimeter | 40 E(16/25)~~51.054
focal parameter | 9/2 = 4.5
eccentricity | 4/5 = 0.8