Figures 
Introduction

Figure 1
Parabola

Figure 3
3 parabolas sides

Figure 4
3 parabolas medians

Figure 4a
3 parabolas color

Figure 5
2 parabolas

Figure 5a
4 parabolas

Figure 6
Pursuit

Figure 8
Spiral

Figure 8a
More spirals

Figure 9
Cardioid

Figure 11
Nephroid

Figure 13
Nephroid envelope circles



Other interactive figures not in paper

Figure A
Circle off center

Figure B
Circle in square

Figure C
Two linked circles

Figure D
Cycloid

Figure E
Speed 4 to 1

Figure F
Speed 5 to 1

Figure G
Cardioid circles

Figure H
Lines between circles



Other sites with interactive figures

Kinematic Method

Mechanical Arguments