Alg2: Ellipses
Select all the values for the variable "a"that make this ellipse a vertical ellipse.
2
1
16
½
8
3
4
36
Select all the values for the variable "a"that make this ellipse a horizontal ellipse.
5
6.7
3
8
-7
11
4.9
6
What is the radius on the minor axis?

9

x2 +y2 =1

9     36

  3

  6

  36

What is the radius on the major axis?

9

x2 +y2 =1

9     36

  3

  6

  36

 

Classify each shape as a circle, ellipse or hyperbola.

x2 - y2 = 1

3     9

x2 + y2 = 49

x2  + y2  =1

4      9

Recall the foci are located at (-c,0) and (c,0) for the ellipse below. Find the coordinates of the foci. *round to the nearest tenth.
negative foci
(          , 0 )
positive foci
(          , 0 )

36

How LONG is the entire minor axis?

x2 +y2 =1

9     36

12

9

6

36

How LONG is the entire major axis?

x2 +y2 =1

9     36

12

9

6

What is the equation of the circle?

x2 + y2 = 4

x2 + y2 =16

What is the equation of the ellipse?
x2 + y2 = 1
16
4
 y2 + x2  = 1
16
4
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