三角形是有三个边的平面图形。
第一个人说一番话，被第二个人听见，和他一起说，此时第三个人反对，而第四个人一看，一边有两个人而一边只有一个人，便跟着那两个人一起说。
The first man said, was the second personal hearing, and he said, now the third and the fourth individual personal against a two side, and only one side, then follow the two together.
有三个面的颜色可能会相同，其中有些边成为不可见状态，使立方体看上去缺乏棱角。
The shading color would be Shared among three sides, making the edges invisible and giving the cube a round look.
街两边有十几家18世纪的房屋，小格林街仅有一个城市街区的长度，但却从二战的大规模空袭和三个世纪来的反复建设中幸存下来。
Lined with about a dozen 18th century homes, Little Green Street only stretches a city block in length, but has survived the Blitz in World War II and three centuries of construction.
有一天，多罗米埃把那三个人拉到一边，指手画脚地向他们说。
One day Tholomyes took the three others aside, with the gesture of an oracle, and said to them.
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.
三角形有三条边和三个角。
三角形有三条边和三个角。
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