An acute angle is any angle which measures smaller than 90 degrees.

Here is a helpful video demonstrating how to measure angles.

 

CURRICULUM LINK:

I have investigated angles
in the environment, and
can discuss, describe and
classify angles using
appropriate mathematical
vocabulary.
MTH 2-17a

 

You may be interested in learning  more about:

Right Angles, Obtuse Angles, Straight Angles, Reflex Angles