几条线组成一个三角形？三个。

How many lines make a triangle? Three.

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该图案由若干三角形组成。

The design is formed with triangles.

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多少条直线组成一个三角形？

How many make a triangle?

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注意一下这对情侣和他们的倒影组成了多少个三角形。

Notice how many triangles are formed by this couple and their reflections.

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图3是由同样大小的等边三角形所组成的。

Diagram 3 consists of several equilateral triangles of equal size.

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蝶形单元是由两个全等的三角形组成。

Butterfly Mechanism consists of two congruent equilateral triangles.

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消防三角形的三个组成部分是甚么？

What are the three components of the Fire Triangle?

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消防三角形的三个组成部分是甚么？

What are the three components of the Fire Triangle?

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