Anacuteanglemeasuresbetween0º and 90º.
Anobtuseanglemeasuresbetween90º and 180º.
Astraightanglemeasuresexactly180º.Theseare easyto spot sincethey look like straightlines.
You can use this informationto classifyany angleyou see.
Example 3
Whatis the nameand classificationof the anglebelow?