Meaning of the word "interior angle" in English

What does "interior angle" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

interior angle

US /ɪnˈtɪr.i.ɚ ˈæŋ.ɡəl/
UK /ɪnˈtɪə.ri.ər ˈæŋ.ɡəl/
"interior angle" picture

Noun

an angle inside a shape, or an angle formed by two lines and a transversal that lies between the two lines

Example:
The sum of the interior angles of a triangle is always 180 degrees.
Each interior angle of a regular hexagon measures 120 degrees.