In this lesson, the teacher explains the three types of angles: acute, straight, and obtuse. A right angle is equal to 90 degrees and can be represented by a little box. An acute angle is less than 90 degrees, while an obtuse angle is greater than 90 degrees. A straight angle is equal to 180 degrees and can be created by making a line. The teacher demonstrates how to identify each type of angle by including three points to create an angle and provides examples for each type.
Identifying an acute, straight and obtuse angle
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