AMC 8 2000 Problem 24

AMC8 2000 年第 24

三角形★★★★
If A=20\angle A = 20^\circ and AFG=AGF\angle AFG =\angle AGF, then B+D=\angle B+\angle D =
若 ,, then ,那么 Problem 25 The area of rectangle is 72. If point form a triangle, the area of that triangle is 矩形 ABCD 的面积是 72.若点 A, 这个三角形的面积是 and the midpoints of 的中点和 and are joined to 的中点这 3 个点相连,形成一个三角形,则
  1. A.4848^\circ
  2. B.6060^\circ
  3. C.7272^\circ
  4. D.8080^\circ
  5. E.9090^\circ

正确答案 · Correct Answer

D

解析 · Solution

解析整理中

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