AMC 8 2006 Problem 19

AMC8 2006 年第 19 题

三角形★★★☆☆
Triangle ABC is an isosceles triangle with AB‾=BC‾\overline{AB}=\overline{BC}. Point D is the midpoint of both BC‾\overline{BC} and AE‾\overline{AE}, and CE‾\overline{CE} is 11 units long. Triangle ABD is congruent to triangle ECD . What is the length of BD‾\overline{BD}?
三角形 ABC 是个等腰三角形,。点 D 是线段的中点,同时也是线段的中点。 线段长度为 11 个单位。三角形 ABD 和三角形 ECD 全等的,则的长度是多少?
AMC 8 2006 Problem 19 figure
  1. A.4
  2. B.4.5
  3. C.5
  4. D.5.5
  5. E.6

正确答案 · Correct Answer

D

解析 · Solution

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