一个三角形有三条边。

A triangle has three sides.

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三角形有三条边和一个高。

A triangle has three sides and a height.

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三角形有三条边和三个角。

The triangle has 3 sides and 3 angles.

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一个直角三角形有六部分组成，即三条边和三个角。

A triangle is composed of six parts, three sides and three angles.

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一个直角三角形有六部分组成，即三条边和三个角。

A triangle is composed of six parts, three sides and three angles.

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