PPT: Lines & Angles | Mathematics (Maths) Class 9 PDF Download

 Page 1


LINES AND LINES AND
ANGLES ANGLES
Page 2


LINES AND LINES AND
ANGLES ANGLES
Point: A Point is that which has no component. It is
represented by a dot.
B A S I C T E R M S
Line: When we join two distinct points then we get a
line. A line has no endpoints it can be extended
infinitely.
Line Segment: It is the part of the line which has two
endpoints.
Page 3


LINES AND LINES AND
ANGLES ANGLES
Point: A Point is that which has no component. It is
represented by a dot.
B A S I C T E R M S
Line: When we join two distinct points then we get a
line. A line has no endpoints it can be extended
infinitely.
Line Segment: It is the part of the line which has two
endpoints.
Ray: Ray is also a part of the line which has only one
endpoint and has no end on the other side.
B A S I C T E R M S
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.
Page 4


LINES AND LINES AND
ANGLES ANGLES
Point: A Point is that which has no component. It is
represented by a dot.
B A S I C T E R M S
Line: When we join two distinct points then we get a
line. A line has no endpoints it can be extended
infinitely.
Line Segment: It is the part of the line which has two
endpoints.
Ray: Ray is also a part of the line which has only one
endpoint and has no end on the other side.
B A S I C T E R M S
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.
B A S I C T E R M S
Page 5


LINES AND LINES AND
ANGLES ANGLES
Point: A Point is that which has no component. It is
represented by a dot.
B A S I C T E R M S
Line: When we join two distinct points then we get a
line. A line has no endpoints it can be extended
infinitely.
Line Segment: It is the part of the line which has two
endpoints.
Ray: Ray is also a part of the line which has only one
endpoint and has no end on the other side.
B A S I C T E R M S
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.
B A S I C T E R M S
W H A T A R E A N G L E S ?
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.
Angles are measured in degrees.
straight line
straight line
vertex
degrees