alleryWhich of these is a ruler-and-compass construction involving a circle?
ADrawing a tangent
BCutting by eye
CMeasuring with a tape
DComputing the area
Answer & Solution
Correct answer: A. Drawing a tangent
1. A line through a given point tangent to a circle is a common construction.
2. Judging by eye or measuring with a tape is not allowed.
3. Computing area is arithmetic, not construction.
_Source: Wikipedia, Straightedge and compass construction, section Common straightedge-and-compass constructions_
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