gr7

gr7

Sunday 10 February 2013

Feb 11 Dispersal Math Task


  • Check dispersal list from Friday blog entry
  • Go to your specified class with a netbook & math textbook
  • No switching classes - teachers have link to blog and are expecting you
  • Complete the following task using Geometer's Sketchpad and following these instructions carefully:
  1. Select Graph
  2. Grid Form
  3. Rectangular Grid
  4. Graph
  5. Plot Points
  6. (-4,0) Plot
  7. (0,0) Plot
  8. (-4,7) Plot
  9. (0,7) Plot
  10. Done
  11. Connect points with Segment Straightedge Tool 
  12. Back to Arrow Tool
  13. Right click on each point and select Coordinates to label.
  14. Right click on any 1 point of rectangle and select Mark Center (this will be the point around which you will rotate rectangle ABCD)
  15. Back to Arrow Tool to highlight each point and line segment.
  16. Choose Transform from top menu.
  17. Choose rotate.  Write 180 degrees.
  18. Right click on each point and select Coordinates to label rotated rectangle.  Choose different color for A'B'C'D'.
  19. Now, take Arrow Tool to center/origin.  Right click on (0,0) and Mark Center (this will be the point around which you will rotate starting rectangle ABCD).
  20. Follow above steps again rotating 270 degrees.
  21. New Sketch.
  22. Plot another shape of your choice.
  23. Follow same steps but when you select Transform choose Translate and slide your shape (-4,5).  Plot new coordinates.
  24. New Sketch
  25. Plot another shape of your choice.
  26. Follow same steps but when you select Transform choose Reflect and flip in y-axis and x-axis.  Plot new coordinates.
Therefore, I want to see the following:
  • 2 Rotations: one about a point on the shape and one about the origin/center (0,0).
  • 1 Translation -4 horizontally, 5 vertically.
  • 2 Reflections: one in x-axis and one in the y-axis
1 transformation on 1 grid.

Save each on USB stick or SD card and I will print.

Should you have difficulty with Geometer's Sketchpad, you are welcome to complete this task on graph paper near projector - again, 1 transformation per sheet of paper.