hi,

i need to describe the rotations for C and D from the clear triangle.

Attachment 21332

i have tried many way but i am unable to find out how to do this so i was looking for some help!

thanks

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- April 1st 2011, 08:05 AMandyboy179rotations
hi,

i need to describe the rotations for C and D from the clear triangle.

Attachment 21332

i have tried many way but i am unable to find out how to do this so i was looking for some help!

thanks - April 1st 2011, 08:43 AMearboth
I've attached a sketch so you can see how the construction should be done:

1. Connect corresponding original and image points.

2. The perpendicular bisectors of these connections intersect at the center of the rotation.

3. Connect the center of the rotation with corresponding original and image points and determine the angle of rotation. - April 1st 2011, 09:35 AMandyboy179
i don't understand. on my other ones i have had answers like, "90 degrees anticlockwise at (0,0)"

would C= 90degree clockwise at (1.5,0.5)? - April 1st 2011, 11:30 AMearboth
I actually gave you "some" help. If it wasn't enough you should tell us where and why you got stuck.

You don't expect me to present you a complete solution, do you?

So once again: What didn't you understand, what did you do by yourself to find a (the) solution?