Meaning & use
acute angle
An angle that measures less than 90 degrees.
See it in a sentence
The triangle contained one acute angle and two obtuse angles.
A slice of pizza often forms an acute angle at its tip.
A note on using this word
An acute angle is always smaller than a right angle, which measures exactly 90 degrees.
Words with a similar meaning
This term is best learned through its definition and examples.
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
obtuse angle
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