有多少三角形？有四个三角形。
在三角形外部画的一个圆，包含了三角形的三个顶点。
A circle that is drawn around the outside of a triangle and contains all the vertices of the triangle.
大部分人都会说这些点不是随机排列的，而是组成了个三角形，尽管组成三角形的线和角并不存在。
The vast majority of people would say that these dots aren't random and form a triangle even though the lines and angles necessary for a triangle to exist aren't really there.
平面上有一个三角形,用两个向量描述,记作A、B，怎样求三角形的面积？
Let's start with a triangle in the plane Well, then we need two vectors to describe it say A and B here. How do we find the area of a triangle?
当我将一个三角形带环绕在清单1实现的整个立方体上时，首先从一个逆时针方向环绕的三角形(0,1,2)开始。
When I wrapped one triangle strip around the whole cube in Listing 1, I started with a triangle that is wound counter-clockwise (0, 1, 2).
赫敏在厚重的黑门上敲了三下，那门上嵌有铁制圆钉，还有一个鹰形门环。
She then rapped three times on the thick black door, which was studded with iron nails and bore a knocker shaped like an eagle.
但我们坚韧不拔的几何学家们发现，如果用等边三角形而非正方形的话，可以省下0.1%的包装材料。
But our intrepid geometers found that by using equilateral triangles rather than squares, they could generate a savings of 0.1 percent.
等边三角形三边相等三内角相等。直角三角形有一个角等于90度。
An equilateral triangle has all sides equal and all angles equal. A right triangle has one Angle equal to 90 degrees.
现在他雇了大约3,000名“弯管工”，这些人要花三个月的时间学习如何手工将玻璃弯成螺旋形。
Today, he employs about 3,000 'benders,' who spend three months learning how to hand-shape the glass into spirals.
通常说中国文字具有意、音、形三美。
The Chinese characters are said to possess beauty in sense, sound and form.
本周我们学习了形状：圆形、方形、长方形、三角形、菱形、心形和椭圆形。
This week we have been working on shapes: circles, squares, rectangles, triangles, diamonds, hearts, and ovals.
画一个房子，只能用长方形、正方形和三角形来画。
所有陆龟品种都在三角形的上部形成一个紧密的点群；所有的水龟都聚集在三角图的下方。
All the land tortoise species formed a tight cluster of points in the upper part of the triangle; all the water turtles cluster in the lower part of the triangular graph.
建议：三明治切成三个三角形。
组成冬季六边形的这六颗星是毕宿五、五车二、北河二(和北河三)、南河三、参宿七和天狼星。
The six stars that compose the Winter Hexagon are Aldebaren, Capella, Castor (and Pollux), Procyon, Rigel, and Sirius.
一个三角形有三条边。
这个图案色彩柔和淡雅，有3个长方形和3个三角形。
This design is in pastel colours with three rectangles and three triangles.
在几何和建筑中，三角形是一种很重要的结构形状。
The triangle is an important structural shape in geometry and construction.
它会继续保持三角形还是会呈现另一种更美观的几何图形？
Will it remain triangular or take on another, more elegant geometric form?
而对天文观察者来说，它意味着夏季的标志—夏季大三角（在夏季的东南方高空里由天琴座的织女星、天鹅座的天津四及天鹰座的牛郎星组成的三角形）的退去和预示着秋季的星座的到来。
For skywatchers it means the passing of the season's trademark Summer Triangle of stars and the arrival of the autumn constellations.
正方形、圆形和三角形是三种形状。
菱形比三角形多。
我有三角形和正方形。
他们用一种三角形的坐标纸把三个测量值画在一起。
They used a kind of triangular graph paper to plot the three measurements against one another.
每个元素单元都有一个包括矩形框架和三角形屋顶的简单布局。
Each elemental unit has a simple layout consisting of a rectangular box and a triangular roof.
它们上面有各种图案：用粉色和绿色的丝绸做成的正方形、三角形和圆圈。
They had designs on them: squares and triangles and circles of pink and green silk.
如果把这两个三角形拼到一起，可以得到一个长方形。
If you put the two triangles together, you can get a rectangle.
一个十面体的面具有六个相等的正方形和八个相等的正三角形。
A cuboctahedron has as faces six equal squares and eight equal regular triangles.
制作一些三角形和圆形。
它们也能表现为描述一个可定义概念或理论概念的性质，如“一切三角形都有三条边”。
They may also take the form of describing properties of a definable or theoretic concept, such as 'all triangles have three sides'.
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