Ellipses Practice

How do you find the center of an ellipse?

• It is right between the focus points.

• It is one of the focus points given.

• It is always (0,0).

• You add together the focus points.

If the foci are (-1, 2) and (1, 2), what is the center?

• (0, 2)

• (2, 0)

• (0, 0)

• (2, 2)

If the foci are (2, 4) and (2, -2), what is the center?

• (2, 1)

• (2, 0)

• (1, 2)

• (0, 0)

If the foci are in the x-direction (horizontal), then PF + PG = __.

• 2a

• 2b

• a

• b

If the foci are in the y-direction (vertical), then PF + PG = __.

• 2a

• 2b

• a²

• b²

Consider an ellipse with foci F(0, 4) and G(0, -4).

In which direction is the ellipse?

• horizontal

• vertical

• ¯\_(ツ)_/¯

• diagonal

Consider an ellipse with foci F(0, 4) and G(0, -4) with PF + PG = 12.

Which is true?

• a = 12

• b = 12

• a = 6

• b = 6

Consider an ellipse with foci F(0, 4) and G(0, -4) with PF + PG = 12.

Which equation is set up correctly to find a?

• a² + 6² = 4²

• a² + 4² = 12²

• a² + 4² = 6²

• a² + 12² = 4²

Consider an ellipse with foci F(2, 4) and G(2, -2).

In which direction is the ellipse?

• Horizontal

• Vertical

• Diagonal

Consider an ellipse with foci F(2, 4) and G(2, -2) with PF + PG = 8.

Which is true?

• a = 4

• b = 4

• a = 8

• b = 8