三角尺
![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/Squadra_30_60.jpg/220px-Squadra_30_60.jpg)
相關條目
参考
- ^ “三角尺”字的解释 | 汉典. 汉典. [2022-07-09]. (原始内容存档于2022-07-09) (中文(中国大陆)).
- ^ 2.0 2.1 Robert Burns Morgan. Elementary Graphs. 1904: 41.
use a small set-square(with one angle a right angle) made from wood, or better still, of celluloid
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