Describe the geometric transformations (C)

Like Tasks (A) and (B), this again involves two rotations, but this time through 60˚ and 120˚ rather than 90˚ and 90˚.
The Quicktime movies show some blue dots being rotated and then the resulting green dots being rotated. [The second movie includes a TRACE of the moving points, which might make it easier to discern the centres of rotation.]
The task is again quite challenging. Play the chosen movie several times and PAUSE it at key moments.
The Worksheet shows a still image from each movie, at the moment when the two rotations have been completed.

NOTE: If needed, you can download a free copy of the QuickTime movie player from here:
http://support.apple.com/downloads/#quicktime

Free

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  • T1-T2-C.mov
  • T1-T2-trace-C.mov
  • T1-T2-C-worksheet.pdf

About this resource

Info

Created: Jan 21, 2015

Updated: Feb 22, 2018

Presentation

mov, 2 MB

T1-T2-C

Presentation

mov, 3 MB

T1-T2-trace-C

Worksheet

pdf, 272 KB

T1-T2-C-worksheet

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