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삼각형을 만드는 빔(beam)

Author:
Kyeongsik Choi, Raphael
3개의 Technic 빔이 하나의 삼각형을 만든다. 빔의 길이는 15이며 중심 간의 최대거리는 14이다. 왜 그런가?
a, b, c 사이에는 어떤 부등식이 성립하는가? 어떤 a, b, c 일 때 직각이 나타나는가?

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