GoGeometry Animations!

Tim Brzezinski, Apr 6, 2017

Contains applets that informally yet dynamically illustrate many of the problems posted by Antonio Gutierrez on Twitter. These problems constitute great and fascinating problem set problems for geometry students.


  • 1. GoGeometry Action 1!
  • 2. GoGeometry Action 2!
  • 3. GoGeometry Action 3!
  • 4. GoGeometry Action 4!
  • 5. GoGeometry Action 5!
  • 6. GoGeometry Action 6!
  • 7. Rhombus Action + Sequel = GoGeometry Action 7!
  • 8. GoGeometry Action 8!
  • 9. GoGeometry Action 9!
  • 10. GoGeometry Action 10!
  • 11. GoGeometry Action 11!
  • 12. GoGeometry Action 12!
  • 13. GoGeometry Action 13!
  • 14. GoGeometry Action 14!
  • 15. GoGeometry Action 15!
  • 16. GoGeometry Action 16!
  • 17. GoGeometry Action 17!
  • 18. GoGeometry Action 18!
  • 19. GoGeometry Action 19!
  • 20. GoGeometry Action 20!
  • 21. GoGeometry Action 21!
  • 22. GoGeometry Action 22!
  • 23. GoGeometry Action 23!
  • 24. GoGeometry Action 24!
  • 25. Thales Action + Sequel = GoGeometry Action 25!
  • 26. GoGeometry Action 26!
  • 27. Carnot Action! = GoGeometry Action 27!
  • 28. GoGeometry Action 28! (Quick Angle Problem)
  • 29. GoGeometry Action 29!
  • 30. GoGeometry Action 30!
  • 31. Incircle + Excircle = GoGeometry Action 31!
  • 32. GoGeometry Action 32!
  • 33. Finsler-Hadwiger Sequel! (GoGeometry Action 33)
  • 34. GoGeometry Action 34!
  • 35. GoGeometry Action 35!
  • 36. GoGeometry Action 36!
  • 37. GoGeometry Action 37!
  • 38. GoGeometry Action 38!
  • 39. GoGeometry Action 39!
  • 40. GoGeometry Action 40!
  • 41. GoGeometry Action 41!
  • 42. GoGeometry Action 42!
  • 43. GoGeometry Action 43!
  • 44. GoGeometry Action 44!
  • 45. GoGeometry Action 45!
  • 46. GoGeometry Action 46!
  • 47. GoGeometry Action 47!
  • 48. GoGeometry Action 48!
  • 49. GoGeometry Action 49!
  • 50. GoGeometry Action 50!
  • 51. GoGeometry Action 51!
  • 52. GoGeometry Action 52!
  • 53. GoGeometry Action 53!
  • 54. Euler Line Surprise! = GoGeometry Action 54
  • 55. 60-Degree Sector Surprise! (GoGeometry Action 55)
  • 56. Neusis Logic Action = GoGeometry Action 56!
  • 57. Rhombus Surprise! (GoGeometry Action 57)
  • 58. GoGeometry Action 58!
  • 59. GoGeometry Action 59!
  • 60. GoGeometry Action 60!
  • 61. GoGeometry Action 61!
  • 62. GoGeometry Action 62!
  • 63. GoGeometry Action 63!
  • 64. GoGeometry Action 64!
  • 65. GoGeometry Action 65!
  • 66. GoGeometry Action 66!
  • 67. GoGeometry Action 67!
  • 68. GoGeometry Action 68!
  • 69. GoGeometry Action 69!
  • 70. GoGeometry Action 70!
  • 71. Square + Rhombus = Constant Surprise! (GoGeometry Action 71)
  • 72. GoGeometry Action 72!
  • 73. GoGeometry Action 73!
  • 74. GoGeometry Action 74!
  • 75. GoGeometry Action 75!
  • 76. GoGeometry Action 76!
  • 77. Parallelogram? Why So? (GoGeometry Action 77)
  • 78. GoGeometry Action 78!
  • 79. GoGeometry Action 79!
  • 80. Concave Quadrilateral Craziness! (GoGeometry Action 80)
  • 81. Square and Quarter Circle Action = GoGeometry Action 81!
  • 82. GoGeometry Action 82!
  • 83. GoGeometry Action 83!
  • 84. Geometric Mean Madness! (GoGeometry Action 84)
  • 85. Hexagonal Surprise! (GoGeometry Action 85)
  • 86. More Geometric Mean Action! (GoGeometry Action 86)
  • 87. GoGeometry Action 87!
  • 88. Equilateral Triangle + Semicircle = ? (GoGeometry Action 88)
  • 89. GoGeometry Action 89!
  • 90. GoGeometry Action 90!
  • 91. GoGeometry Action 91!
  • 92. GoGeometry Action 92!
  • 93. GoGeometry Action 93!
  • 94. GoGeometry Action 94!
  • 95. GoGeometry Action 95!
  • 96. GoGeometry Action 96!
  • 97. GoGeometry Action 97!
  • 98. GoGeometry Action 98!
  • 99. GoGeometry Action 99!
  • 100. GoGeometry Action 100!
  • 101. GoGeometry Action 101 !
  • 102. GoGeometry Action 102 !
  • 103. GoGeometry Action 103!
  • 104. GoGeometry Action 104!
  • 105. GoGeometry Action 105!
  • 106. GoGeometry Action 106!
  • 107. GoGeometry Action 107!
  • 108. GoGeometry Action 108!
  • 109. GoGeometry Action 109!
  • 110. GoGeometry Action 110!
  • 111. GoGeometry Action 111!
  • 112. GoGeometry Action 112!
  • 113. GoGeometry Action 113!
  • 114. GoGeometry Action 114!
  • 115. GoGeometry Action 115!
  • 116. GoGeometry Action 116!
  • 117. GoGeometry Action 117!
  • 118. Blanchet Action = GoGeometry Action 118!
  • 119. GoGeometry Action 119!
  • 120. GoGeometry Action 120!
  • 121. GoGeometry Action 121!
  • 122. GoGeometry Action 122!
  • 123. GoGeometry Action 123!
  • 124. GoGeometry Action 124!
  • 125. GoGeometry Action 125!
  • 126. GoGeometry Action 126!
  • 127. GoGeometry Action 127!
  • 128. GoGeometry Action 128!
  • 129. GoGeometry Action 129!
  • 130. GoGeometry Action 130!
  • 131. GoGeometry Action 131!
  • 132. Incircle Extension = GoGeometry Action 132!
  • 133. Incircle Extension 2 = GoGeometry Action 133!
  • 134. GoGeometry Action 134!
  • 135. GoGeometry Action 135!
  • 136. GoGeometry Action 136!
  • 137. GoGeometry Action 137!
  • 138. GoGeometry Action 138!
  • 139. GoGeometry Action 139!
  • 140. GoGeometry Action 140!
  • 141. GoGeometry Action 141!
  • 142. GoGeometry Action 142!
  • 143. GoGeometry Action 143!
  • 144. Find that Angle! (GoGeometry Action 144)
  • 145. Bizarre Trisection (V2) = GoGeometry Action 145!
  • 146. Bizarre Trisection (V3) = GoGeometry Action 146!
  • 147. GoGeometry Action 147!
  • 148. GoGeometry Action 148!
  • 149. Cyclic Quadrilateral: Quick Warm Up (GoGeometry Action 149!)
  • 150. Archimedes Insight = GoGeometry Action 150!
  • 151. More Archimedes Insight = GoGeometry Action 151!
  • 152. GoGeometry Action 152!
  • 153. GoGeometry Action 153!
  • 154. GoGeometry Action 154!
  • 155. GoGeometry Action 155!
  • 156. GoGeometry Action 156!
  • 157. Archimedes Insight 3: GoGeometry Action 157!
  • 158. GoGeometry Action 158!
  • 159. GoGeometry Action 159!
  • 160. GoGeometry Action 160!
  • 161. GoGeometry Action 161!
  • 162. GoGeometry Action 162!
  • 163. GoGeometry Action 163!
  • 164. GoGeometry Action 164!
  • 165. GoGeometry Action 165!
  • 166. GoGeometry Action 166!
  • 167. Feuerbach Action! (GoGeometry Action 167)
  • 168. GoGeometry Action 168!
  • 169. GoGeometry Action 169!
  • 170. GoGeometry Action 170!
  • 171. GoGeometry Action 171!
  • 172. GoGeometry Action 172!
  • 173. GoGeometry Action 173!
  • 174. GoGeometry Action 174!
  • 175. Regular Nonagon Simplicity (GoGeometry Action 175!)
  • 176. More Nonagon Wonders (GoGeometry Action 176!)
  • 177. GoGeometry Action 177!
  • 178. GoGeometry Action 178!
  • 179. GoGeometry Action 179!
  • 180. GoGeometry Action 180!
  • 181. GoGeometry Action 181!
  • 182. GoGeometry Action 182!
  • 183. GoGeometry Action 183!
  • 184. GoGeometry Action 184!
  • 185. GoGeometry Action 185!
  • 186. GoGeometry Action 186!
  • 187. GoGeometry Action 187!
  • 188. GoGeometry Action 188!
  • 189. GoGeometry Action 189!
  • 190. Regular Octagon Phenomenon (GoGeometry Action 190)
  • 191. GoGeometry Action 191!
  • 192. Regular Pentagon Wonder: GoGeometry Action 192!
  • 193. GoGeometry Action 193!

1.

GoGeometry Action 1!

Creation of this applet was inspired by this [url=https://twitter.com/gogeometry/status/833690663426326528]tweet[/url] from [url=https://twitter.com/gogeometry]Antonio Gutierrez[/url]. [br][br]BIG points are moveable, yet all dynamics will be illustrated only if point [i]G[/i] (see [url=https://twitter.com/gogeometry/status/833690663426326528]tweet[/url]) lies ABOVE [color=#38761d][b]the smaller semicircle.[/b][/color] [br][br][b][color=#0000ff]How can you formally prove what this applet informally illustrates? [/color][/b]
Quick (Silent) Demo
– Tim Brzezinski

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