# Search Results for “ellipse”

##### Ellipse Isotomic

The ellipse isotomic generated by point D is teh locus of the reflection of D in the tangents to the ellipse. What shape is the isotomic when D lies on one of the foci of the ellipse? Why?##### Ellipse Reflection Property

One definition of an ellipse is as the locus of points the sum of whose distance from two fixed points (the foci) is constant. This gives you a way to draw the ellipse with two pins and a piece of string. Here we relate that definition to the focal property: that light emanating from one focus reflects to the other focus.##### Alternate Ellipse Construction

This app allows you to experiment with an alternate construction of an ellipse. The tracing of the perpendicular bisector of the segment between a point on a circle and a point in the circle create an elliptical locus. (G-GPE 3)##### Ellipse Equations

This app allows you to practice writing the equation of an ellipse (horizontal and vertical) given a graph. (G-GPE 3)##### Ellipse Incenter Locus

What is the locus of the incenter of the triangle formed by the string in the "two pins and a piece of string" construction of an ellipse?##### Ellipse Equations

This app allows you to practice writing the equation of an ellipse (horizontal and vertical) given a graph. (G-GPE 3)##### Ellipse Definition

This app allows you to experiment with the definition of an ellipse as the set of points in which the sum of the distances from two fixed points is a constant. (G-GPE 3)##### Polar Point Ellipse

The polar point of a line in an ellipse is a common point to the chords defined by the common tangents through the points on the line. Play with it and the meaning will be clear! (Go to**Full Screen**if the green points won't drag)