四角的的英文：
four square ;tetragonal

A secure stepladder.
稳固的四角梯

The Forbidden City has four imposing gates and at each comer is an exquisitely designed watch tower.
紫禁城有4个富丽堂皇的大门，在城四角矗立着风格绮丽的角楼。

Tie the corners of the handkerchief to the points of the cross, and you will have a nice strong kite.
把手绢的四角与十字架端头绑牢，这样你就可以做成一个很好，很结实的风筝了。

"Its four sides darken the bright sun, Its seven stories cut the grey clouds;"
四角碍白日,七层摩苍穹。

The under cover should rest on the four corners of the machine table groove.
把底槽支到机台沟的四角上。

On chilly nights, the room was warmed by coals burning in brazier set in the corners of the room
在寒冷的夜晚，屋子四角的火盆里都烧上炭，屋子就暖和了。

(Parsons School of Design in New York) a sturdy rectangular table with block legs at the four corners.
（纽约帕森斯设计学校中）一种四角有木腿的坚固的直角桌子。

On chilly nights, the room was warmed by coals burning in brazier set in the corners of the room.
在寒冷的夜晚，屋子四角的火盆里都烧上炭，屋子就暖和了。

A small,flat - bottomed fishing boat with a lugsail on a raking mast.
平底(渔)船小型平底鱼船，在倾斜桅杆上有四角帆

Four divides eight.
4能除尽8。

We have four terms a year.
我们每年有四个学期。

The hunters bagged four deer.
猎人们捕杀了4只鹿。

circumscribe a square
画正方形的外接圆.

A squared rectangle is a rectangle dissected into at least two squares
方化矩形是指可以分割成至少两个正方形的矩形。

The constituent squares in a squared rectangle have commensurable sides
在方化矩形中，组成矩形的各个正方形有可公度的边。

A trapezoid is a tetragon with two parallel sides.
梯形是具有两平行边的四边形。

The kite is a tetragon with one line of symmetry.
风筝是个有一条对称线的四边形。