alleryHow many basic constructions do all ruler-and-compass constructions repeat?
AThree
BFour
CFive
DSix
Answer & Solution
Correct answer: C. Five
1. The text lists five basic constructions.
2. They are: a line through two points, a circle with given centre through a point, and three kinds of intersection (line-line, line-circle, circle-circle).
3. Every construction is built by repeating these five.
_Source: Wikipedia, Straightedge and compass construction, section The basic constructions_
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