무게중심에서 각 꼭짓점까지 이르는 거리가 주어 졌을 때 삼각형 작도하기(Constructing a triangle given the three distances from centroid to each vertex) : https://goo.gl/8mBtoC YouTube : https://youtu.be/Rco299erTFY GeogebraTube : https://ggbm.at/amy7gx5f [br][br][br]기하작도문제 : https://ggbm.at/jFazZw2g 수학자료실 강의실 : https://goo.gl/czyJLW YouTube Channel : https://goo.gl/JpzU5i twitter : https://twitter.com/mineungi[br][br]