3 sentences for 直 (zhí — straight)

1. 他画了一条很直的线。

   tā huà le yī tiáo hěn zhí de xiàn.

   He drew a very straight line.

   Source: Dong Chinese Dictionary

2. 这根圆柱体的直径正好是十厘米。

   zhè gēn yuán​zhù​tǐ de zhí jìng zhèng​hǎo shì shí lí​mǐ.

   The diameter of this cylinder is exactly ten centimeters.

   Source: Dong Chinese Dictionary

3. 老师要求我们用直尺和圆规画出一个等边三角形。

   lǎo​shī yāo​qiú wǒ​men yòng zhí chǐ hé yuán​guī huà​chū yī gè děng​biān sān​jiǎo​xíng.

   The teacher asked us to draw an equilateral triangle using a ruler and a compass.

   Source: Dong Chinese Dictionary