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How many triangles does a pentagram have As shown in the figure, there are several triangles
According to the rule number:
1. There are five "1,2,3,4,5 --" composed of one figure;
2. There are 0 figures composed of two figures;
3. It consists of three figures, including 1,2,3,4,5 --;
4. There are 0 of the four figures;
5. Of the five figures, there are 0;
6. If there are 6 figures, there are 0;
7. By. Don't look, a total of six parts
So there are 10 triangles
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