4 sentences

1. 小女孩在纸上画了一个正方形。

   xiǎo nǚ​hái zài zhǐ shang huà le yī​ge zhèng​fāng​xíng.

   The little girl drew a square on the paper.

   Source: UM-Corpus: Spoken

2. 画一条对角线，把正方形分成两个三角形。

   huà yī tiáo duì​jiǎo​xiàn, bǎ zhèng​fāng​xíng fēn​chéng liǎng ge sān​jiǎo​xíng.

   Draw a diagonal line to divide the square into two triangles.

   Source: UM-Corpus: News

3. 正方形是具有四个等边和四个直角的图形。

   zhèng​fāng​xíng shì jù​yǒu sì ge děng biān hé sì ge zhí​jiǎo de tú​xíng.

   A square is a figure with four equal sides and four right angles.

   Source: UM-Corpus: Education

4. 最简单的版本可能是一个顶部有一个循环的正方形。

   zuì jiǎn​dān de bǎn​běn kě​néng shì yī​ge dǐng​bù yǒu yī​ge xún​huán de zhèng​fāng​xíng.

   The simplest version might be a square with a loop at the top.

   Source: CCMatrix