alleryWhich operation is a common construction that copies a point across a line?
AMirroring a point
BDoubling a point
CSliding a point
DErasing a point
Answer & Solution
Correct answer: A. Mirroring a point
1. Mirroring a point in a line means finding its reflection.
2. It is listed among the common ruler-and-compass constructions.
3. The other options are not constructions in the list.
_Source: Wikipedia, Straightedge and compass construction, section Common straightedge-and-compass constructions_
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