some important notes of lines and angles chapter of maths class 9
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Basic terms and Definitions
1. Point - A Point is that which has no component. It is represented by a dot.
2. Line - When we join two distinct points then we get a line. A line has no endpoints it can be extended infinitely.
3. Line Segment - It is the part of the line which has two endpoints.
4. Ray - Ray is also a part of the line which has only one endpoint and has no end on the other side.
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Revision Notes on Lines and Angles
Basic terms and Definitions
1. Point - A Point is that which has no component. It is represented by a dot.
2. Line - When we join two distinct points then we get a line. A line has no endpoints it can be extended infinitely.
3. Line Segment - It is the part of the line which has two endpoints.
4. Ray - Ray is also a part of the line which has only one endpoint and has no end on the other side.
5. Collinear and Non-collinear points – Points lie on the same line are known as collinear points and the points that don't lie on the same line are known as Non-Collinear Points
Angles
When two rays begin from the same endpoint then they form an Angle. The two rays are the arms of the angle and the endpoint is the vertex of the angle.
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