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Challenge 2a: Reflection in the line y = a
Author:
Nicola Trubridge
Topic:
Reflection
What stays the
same
and what
changes
as you move the points around? Where would the co-ordinate (x,y) map to? 隨著點的移動,什麼保持不變,什麼改變? 坐標(x,y)會映射到哪裡?
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