AMC 8 2001 Problem 23

AMC8 2001 年第 23

三角形★★★★
Points RR, SS and TT are vertices of an equilateral triangle, and points XX, YY and ZZ are midpoints of its sides. How many noncongruent triangles can be drawn using any three of these six points as vertices?
RRSSTT 是一个等边三角形的三个顶点,点 XXYYZZ 分别是边的中点。使用这六个点中的任意三个作为顶点,可以画出多少个不全等的三角形?
  1. A.1
  2. B.2
  3. C.3
  4. D.4
  5. E.20

正确答案 · Correct Answer

D

解析 · Solution

解析整理中

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