AMC 8 1998 Problem 4
AMC8 1998 年第 4 题
三角形★★☆☆☆
How many triangles are in this figure? (Some triangles may overlap other triangles.)
图中有多少个三角形？（有些三角形可能与其他三角形重叠。）
- A.9
- B.8
- C.7
- D.6
- E.5
正确答案 · Correct Answer
E
解析 · Solution
Solution 1
By inspection, we have that there 5 triangles: Each of the 3 small triangles, 1 medium triangle made of the rightmost two small triangles, and the 1 large triangle.
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