210° is a reflex angle. A reflex angle is between 180° and 360°.
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Angles less than 90 = actute Angles of 90 = right angle Angles more than 90 = obtuse Angles more than 180 = reflex
45 degree angle
There isn't a specific name for 45 degrees, like when 90 degree angle is called a "right angle". However, there is a general term for any angle less than 90 degrees - "acute angle". Here's a full list: < 90 degrees = acute 90 degrees = right angle between 90 & 180 degrees = obtuse 180 degrees = straight line between 180 & 360 degrees = reflex 360 deg = revolution (because it turns in a complete circle)
45 degrees. 45 degrees
An acute angle