AMC 8 2001 Problem 23

AMC8 2001 年第 23 题

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?
点 RR,SS 和 TT 是一个等边三角形的三个顶点,点 XX,YY 和 ZZ 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?
AMC 8 2001 Problem 23 figure
  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

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