This was written to be used a teacher-led resource. It was written using the enhanced features of PowerPoint 2003, therefore the full effect of the lesson can only be seen using PowerPoint 2003 (or PowerPoint XP). If you are running Office 2000, you can download a PowerPoint 2003 Viewer from Microsoft and this will enable you to run the file as it was intended. In response to the feedback I’ve received, I have removed the security on the original file to enable it to be saved to an external source (flash drive, etc).
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Error in proof. This is very nice but surely the cosine of (1/1) = cos(1) = 0?? <br /> <br />You can not have the adjacent lenght shown as 1 or this will mean that your angle is zero!! <br /> <br />In any case, when you ovelap the triangles you can see that the length of the adjacent on the first triangle is
This is lovely. This is lovely and effective - this is what maths is about at this level!
Good resource. I love to be able to see why, as do my students. So thanks for this. A natural extension would be to look for angles greater than 45.
title?. visually very nice and convincing for angles of theta less than 45 degrees
Great but need to save it. Thought it wqs really great, would love to use it with my year 13 but as it is read-only can't save it onto my memory stick!!
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