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Centre of rotation watch

1. Attachment 699474I need help finding the centre of rotation without tracing paper, I think I know how to d o it. But could someone help me further.

How do I rotate a shape with our tracing paper? Forgot how do to it….
2. Attachment 699476Here...
3. (Original post by SBizzy)
Attachment 699474I need help finding the centre of rotation without tracing paper, I think I know how to d o it. But could someone help me further.

How do I rotate a shape with our tracing paper? Forgot how do to it….
Rotation by 180 degrees is the same as just multiplying x and y by -1.

What level are you studying at?
4. (Original post by SBizzy)
Attachment 699476Here...
When you rotate a shape about a centre C, each point on the shape remains at the same distance from C, and follows an arc of a circle, with the size of the arc depending on the angle.

In this case, each point will move through 1/2 a circle, since 180 degrees is 1/2 a circle turn.

Does that help?
5. (Original post by DFranklin)
Rotation by 180 degrees is the same as just multiplying x and y by -1.

What level are you studying at?
Gcse my bro, have a block test on monday!
6. (Original post by atsruser)
When you rotate a shape about a centre C, each point on the shape remains at the same distance from C, and follows an arc of a circle, with the size of the arc depending on the angle.

In this case, each point will move through 1/2 a circle, since 180 degrees is 1/2 a circle turn.

Does that help?
Thanks!
7. (Original post by atsruser)
When you rotate a shape about a centre C, each point on the shape remains at the same distance from C, and follows an arc of a circle, with the size of the arc depending on the angle.

In this case, each point will move through 1/2 a circle, since 180 degrees is 1/2 a circle turn.

Does that help?
When it says Describe the full transformation for e,g A onto b.. How do I find the centre of rotation, without tracing paper?
8. I know how to do it now, just remembered

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