china-negtive | 1 points | Feb 01 2022 05:01:51

古罗马三角板

https://i.redd.it/3ysa3gqtl5f81.jpg

[-] tioct | 1 points | Feb 01 2022 05:23:19

这板板有什么用,不如俺支四书五经来的有学问gif

[-] Meonpolo | 1 points | Feb 01 2022 06:04:32

哀方加逼方得c方

[-] Independent-Gur5098 | 1 points | Feb 01 2022 23:12:28

勾股是什么鸡巴我只知道Pythagore