Table of Contents

1. Polygons with diagonals
   1. #1 Dodecahedron with diagonals
   2. #2 Dodecahedron with diagonals
   3. #3 16-gon with diagonals
   4. #4 18-gon with diagonals
   5. #5 18-gon with diagonals
   6. #6 18-gon with diagonals
   7. #7 18-gon with diagonals
   8. #8 18-gon with diagonals
   9. #9 18-gon with diagonals
2. Zigzag lines & stacked ellipses
   1. #10 Zigzag
   2. #11 Ellipses
3. Semicircles in rectangles
   1. #12 Semicircles in rectangle 1
   2. #13 Semicircles in rectangle 2
4. Triangles and (Semi)Circles
   1. #14 Three Circles of Thales
   2. #15 Triangle, Incircle, Semicircles, Triangle
   3. #16 Affinely Distorted Star of David with incircles
   4. #17 Affinely Distorted Star of David with incircles and circumcircles
   5. #17a Affinely Distorted Star of David with circumcircles
   6. #18 Closed path in triangle with incircles
   7. #19 Triangle, closed path, incircles
   8. #20 Quartertriangles and Circumcircles
   9. #21 Quatertriangle and Incircles
   10. #22 Quartertriangles & Incircles
   11. #23 Triangle, Incircle, Point Inside
   12. #24 Two triangles, same incircle
   13. #25 Mirror-image Triangles with Circumcircles
   14. #26 Mirror-image triangles with circumcircles (2)
   15. #27 Quartertriangles with circumcircles
5. Mostly circles
   1. #28 Homage to Gian Francesco Malfatti
   2. #29 Homage to Malfetti 2
   3. #30 Homage to Malfetti 3
   4. #31 Soddy circles inside triangle
   5. #32 Triangle, circumcircle, 3 inscribed circles
   6. #33 Crescent or Arbelos
   7. #34 Cloverleaf
   8. #35 Circles Inside Circle
   9. #36 Nested tangent circles 1
   10. #37 Three tangent circles inside large circle
   11. #38 Nested tangent circles 2
   12. #39 Nested tangent circles 3
   13. #40 Nested tangent circles 4
   14. #41 Cloverleaf with stem
   15. #85 Kissing Circles
   16. #86 Three Mickey Mice in a circle
6. Triangles & circles (mostly)
   1. #42 Triangle, Midpoints, Circumcircle, Incircle
   2. #43 Four lines and four circles
   3. #44 Triangle, inscribed circle
   4. #45 'Cube' and circles
   5. #46 Common internal tangents 3 circles
   6. #47 Common external tangents
   7. #48 Common internal tangents 2
   8. #49 Common internal tangents 3
7. More polygons
   1. #50 Quadrilaterals inside hexagon
   2. #51 Closed path inside pentagon
   3. #52 Closed path in triangle
   4. #53 Quatertriangles and altitudes
   5. #54 Parallelograms in triangle
   6. #55 Parallelograms in triangle 2
   7. #56 Distorted Star of David with parallelograms
   8. #57 Hexagon, triangle and midpoints
   9. #58 Hexagon, Triangle, Midpoints 2
   10. #59 'Cube', triangle and altitudes
   11. #60 Hexagon, triangle, circles
   12. #61 Point in triangle reflected over midpoints
   13. #62 Triangle, point inside, angle bisectors
8. Squares on polygons
   1. #63 Squares on a triangle
   2. #64 Double squares on triangle
   3. #65 Squares on each leg of triangle
   4. #95 Squares on a triangle 2
   5. #66 Squares & parallelograms on triangle
   6. #67 Triangles on squares on triangle
   7. #68 Squares, parallelograms on triangle 2
   8. #69 Squares, parallelograms on triangle 3
   9. #70 Squares, parallelograms on triangle 4
   10. #71 Squares, triangles on triangle
   11. #72 Squares, triangles on triangle 2
   12. #77 Squares sharing a common corner
   13. #78 Squares sharing a common corner 2
   14. #84 Squares on a triangle
9. Polygons (mostly triangles) & relationships
   1. #73 Rectangles on triangle
   2. #74 Isosceles triangles, parallelograms on triangle
   3. #75 Isosceles triangles, parallelograms on triangle 2
   4. #76 Triangles and altitudes on a triangle
   5. #79 Three isosceles triangles with common vertex
   6. #80 3 Isosceles triangles with common vertex and vertex angle
   7. #81 Right triangles built in equilateral triangle
   8. #82 Angle, bisector, rays, intersections
10. Triangles and other polygons
    1. #83 Rectangles in a rectangle
    2. #87 Triangle, Cevians & circle
    3. #88 Triangle, circle and perpendiculars
    4. #89 Triangle, square, altitude inside
    5. #90 Midpoints of reflected triangles
    6. #91 Midpoints triangle & segments joining reflections
    7. #92 Altitudes of reflected triangles
    8. #93 Medians of reflected triangles
    9. #94 Regular pentagons on a triangle
    10. #96 Squares sharing common vertex
    11. #97 Two regular pentagons sharing vertex
    12. #98 Two regular hexagons sharing a vertex
    13. #99 Squares on a quadrilateral