Identifying an acute, straight and obtuse angle- Online Tutor- Free Math Videos

The video tutorial explains the different types of angles: right, acute, obtuse, and straight. It begins with a discussion on right angles, using squares and perpendicular lines as examples, and emphasizes the importance of using three points to define an angle. The tutorial then defines acute angles as those less than 90 degrees, obtuse angles as those greater than 90 degrees, and straight angles as those equal to 180 degrees. Examples are provided for each type of angle to aid understanding.

Explain the significance of the vertex in angle formation.

Describe what a straight angle is and provide its measure.