CBSE Class 9 Maths Chapter 6 Lines and Angles Revision Notes
Revision is very important for better conceptual understanding and securing good marks, and for Revision, Revision Notes are always considered the best. CBSE Class 9 Maths Chapter 6 Lines and Angles Revision Notes can be very beneficial for students to revise all their previously prepared chapters and concepts, especially during the examination times when they have to revise the whole syllabus in a limited time period.
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In geometry, the lines and angles are important tools. A line is a collection of points along a straight path, it extends in both the directions and has no endpoints. It has no definite length. An angle is a figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.
1. An angle is a union of two non-collinear rays with a common initial point.
2. Two adjacent angles are said to form a linear pair if their sum is 180°. Non-common arms of the linear pair of angles form a straight line.
3. Sum of the angles around a point is equal to 360°.
4. Two rays originating from the same endpoint form an angle.
CBSE Class 9 Maths Chapter 6 Lines and Angles Revision Notes PDF