作者LPH66 ( )
看板puzzle
标题[中译] Puzzleup 2021 (1) EQUILATERAL TRIANGLES
时间Fri Sep 3 08:29:04 2021
题目网址:
https://www.puzzleup.com/2021/
https://www.puzzleup.com/2021/puzzle/?1
答题时限: ９月２日７ＰＭ－比赛结束（约11月９日）
加分时限: ９月２日７ＰＭ－９月７日６：５９ＰＭ
答对可得基本分１００分。答案可上传５次，每改１次答案从基本分扣２０分。
比赛期间内可随时上传答案，加分时限内答对第ｎ天加（６－ｎ）分
另依题目的难易有额外加分（如有８０％的人这题答错，答对者加８０分）
◆EQUILATERAL TRIANGLES
https://www.puzzleup.com/2021/img/puzzle/2021/01.jpg
How many equilateral triangles can be obtained by joining 19 points shown in
the figure?
-All pairs of points are equidistant.
-Three possible triangles are drawn as an example.
https://www.puzzleup.com/2021/img/puzzle/2021/01s.jpg
图中的 19 个点互相连结可以得出多少个正三角形？
- 每对相邻的点距离都相等。
- 其中的三种画法如上图所示。
--
'You've sort of made up for it tonight,' said Harry. 'Getting the
sword. Finishing the Horcrux. Saving my life.'
'That makes me sound a lot cooler then I was,' Ron mumbled.
'Stuff like that always sounds cooler then it really was,' said
Harry. 'I've been trying to tell you that for years.'
-- Harry Potter and the Deathly Hollows, P.308
--
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※ 文章网址: https://webptt.com/cn.aspx?n=bbs/puzzle/M.1630628950.A.909.html
※ 编辑: LPH66 (180.177.0.237 台湾), 09/03/2021 08:29:30
1F：→ LPH66: 不注意还真的会有各种漏算...这题不简单 09/03 08:30