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Mathematics 17 Online
OpenStudy (anonymous):

ELLIPSE?

OpenStudy (davidusa):

What?

OpenStudy (anonymous):

Curve on a plane with focal points

OpenStudy (davidusa):

This is an ellipse. |dw:1392521352893:dw| slanted a little

OpenStudy (davidusa):

got it now?

OpenStudy (anonymous):

How about its properties? :))

OpenStudy (davidusa):

let me see liliegirl ill get it

OpenStudy (anonymous):

k. take your time :))

OpenStudy (davidusa):

In mathematics, an ellipse is a curve on a plane surrounding two focal points such that a straight line drawn from one of the focal points to any point on the curve and then back to the other focal point has the same length for every point on the curve.

OpenStudy (davidusa):

lilie think of a cone, ok?

OpenStudy (davidusa):

|dw:1392521597570:dw|

OpenStudy (anonymous):

|dw:1392521652977:dw|

OpenStudy (davidusa):

|dw:1392521652431:dw|

OpenStudy (davidusa):

When you cut it this way, you get a circle,

OpenStudy (davidusa):

But when you cut it this way, you get an ellipse. |dw:1392521774938:dw|

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