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단면상수 계산 공식
벡터의 외적과 도형의 면적.pdf
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Area of a polygon algorithm - Math Open Reference.pdf
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다각형의 면적계산 참고자료
https://mathworld.wolfram.com/PolygonArea.html
Wolfram MathWorld: The Web's Most Extensive Mathematics Resource
Comprehensive encyclopedia of mathematics with 13,000 detailed entries. Continually updated, extensively illustrated, and with interactive examples.
mathworld.wolfram.com
https://www.mathopenref.com/coordpolygonarea2.html
Area of a polygon algorithm - Math Open Reference
If you know the coordinates of the vertices of a polygon, this algorithm can be used to find the area. The algorithm assumes the usual mathematical convention that positive y points upwards. In computer systems where positive y is downwards (most of them)
www.mathopenref.com
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