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Maths question i need help with watch

1. ABCD IS A SQUARE.
It is rotated through 90 degreees clockwise about B
Draw accurately the locus of the point D

http://papers.xtremepapers.com/CIE/C..._w08_qp_02.pdf

question 5 on the paper help is appreciated
2. So you know what a locus is yeah? In this case it's just the path that point D follows.

I'd start of by accurately drawing the new square and label where point D ends up. Then, get a compass and put it on point B with the pencil on point D. Move the compass around so you have a curved line connecting the old point D with the new point D. This will give you the path or 'locus' that D traveled.
3. thank you very much is there any chance you can do it on a paper and upload just to make sure i've got the right answer as i have no one to help me with this.
4. The locus will be the arc of a circle.

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