alleryWhich two tools are allowed in classical construction?
AProtractor and set square
BMarked ruler and divider
CPlain straightedge and compass
DRuler and measuring tape
Answer & Solution
Correct answer: C. Plain straightedge and compass
1. Classical constructions use only an idealized ruler and a compass.
2. The ruler has no markings, so it cannot measure lengths.
3. A protractor or marked ruler would let you read values, which breaks the rule of exact construction.
_Source: Wikipedia, Straightedge and compass construction, lead section_
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