equilateral相关的词根或词缀是: later

So the interior angles of an equilateral triangle are all 60 degrees .

度，所以等边三角形的三个内角都是。

But our intrepid geometers found that by using equilateral triangles rather than squares , they could generate a savings of 0.1 percent .

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。

It has unique equilateral triangle cellular construction and its intensity of frame is strong .

特有的正三角形单元结构，骨架强度大。

Tetrahedron a three-dimensional solid , a polyhedron , in which all four faces are equilateral triangles .

四面体一种三维立体，是四个面都为等边三角形的多面体.

The pyramids , at least , are built out of native-colored materials , but with the straight lines and equilateral triangles indicate man-made structures ; hence my guess at form as wall as substance as the disguising factor .

金字塔也是用自然色的材料建造的，但是它外观上的那些直线以及等边三角形的轮廓都具有人造建筑的特征。因此，我认为看不清长城的原因在于它的外形，材质以及环境伪装因素。