Where does this definition of an internal angle come from?
This entry for an internal angle is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is an internal angle a noun, verb, or something else?
In this entry, an internal angle is tagged as 2n..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.