The ellipse as a locus.
The ellipse is the locus of all points the sum of whose distances from two fixed points is a constant. We visualize this definition and check the sum of distances when a point runs the ellipse.
Compound Interest Modeling and Questions
Triangle Exterior Angles: Quick Exploration
Intro: Translations in the Coordinate Plane
Optical Illusion 1
Coxeter - Figure 1.6 B
Corresponding Angles and Consecutive Interior Angles
Sketch second derivatives - 1
My flower made by Rada (CRO)