trilateral

Having or involving three sides, countries, or parties.

三边的有三条边的或涉及到三条边、三个国家或三方的

The side AB is the shortest of the three sides of the triangle ABC .

边AB是三角形ABC三个边中最短的边。

a three-sided regular polygon.

有三条边的等边多角形。

triangular pediment

成等边三角形的三角墙

The sum of any two sides of a triangle is greater than the third side.

任何三角形的两边之和必大于第三边。

The base of the triangle coincides with one side of the square.

这三角形的底边与这四边形的一边相重合。

The seat be in the second and third rows be all that 's leave .

只有第二三排的边座了。

Line AB is the base of the triangle ABC.

AB线是三角形ABC的底边。

(of a triangle) having two sides of equal length.

（三角形）有二等边的。

a triangle with two equal sides.

有两条边相等的三角形。

The side of a triangle subtends the opposite angle.

三角形的边对着对角

the angle contained by two sides of a triangle

三角形两边的夹角.

The hypotenuse is the longest side of a right triangle.

直角三角形的斜边是直角三角形中最长的边。

The Virtual Boundary Element Method for Exterior Problems of the 3-D Helmholtz Equation

三维Helmholtz方程外边值问题的虚边界元法

I was taught that two sides of a triangle were greater than the third.

我被教会三角形两个边的和大于第三个边。

Little shop-girls went fluttering by in pairs and fours, chattering, laughing.

年轻的女店员三三两两蹦蹦跳跳从身边走过，一边走一边说笑着。

(mathematics) of a triangle having three sides of different lengths.

（数学）有三条长度不等的边的三角形。

The point of intersection of the three altitudes of a triangle.

垂心三角形的三边垂线的交点