Angles in Geometry - CBSE Maths Lesson for Class V http://videos.successcds.net/educatio...
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About this Video :
Angles consist of 2 arms and a vertex.
It is the degree measure between 2 arms having a common vertex.
Types of Angles Acute Angle Obtuse Angle Right Angle Straight Angle Reflex Angle Complete Angle
1. Acute Angle
An Angle whose measure is between Zero degree & 90 degree is called acute angle.
2. Obtuse Angle
An Angle whose measure is between 90 degree & 180 degree is called obtuse angle.
3. Right Angle
An Angle whose measure is between 90 degree.
4. Straight Angle
An Angle whose measure is exactly 180 degree.
5. Reflex Angle
An Angle whose measure is greater than 180 degree but less than 360 degree.
6. Complete Angle
An Angle whose measure is 360 degree.
Pair of Angles whose sum is 90 degree.
Pair of Angles whose sum is 180 degree.
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