PPT: Lines and Angles | Mathematics for Class 6 PDF Download

 Page 1


PRIMARY 6
LINES AND ANGLES
Page 2


PRIMARY 6
LINES AND ANGLES
Geometry starts with basic concepts like points,
lines, rays, line segments, and angles. These
fundamental ideas serve as the building blocks
of plane geometry. Understanding these basics
is important because they help us explore and
analyze more complex shapes and geometric
structures.
I N T R O D U C T I O N
Page 3


PRIMARY 6
LINES AND ANGLES
Geometry starts with basic concepts like points,
lines, rays, line segments, and angles. These
fundamental ideas serve as the building blocks
of plane geometry. Understanding these basics
is important because they help us explore and
analyze more complex shapes and geometric
structures.
I N T R O D U C T I O N
Imagine making a tiny dot on your paper
with a sharp pencil. The sharper the tip, the
smaller the dot—this is similar to a point in
geometry. A point represents an exact
position but has no size, length, width, or
height—it’s just a location.
P O I N T
In geometry, we label points using capital
letters like A, B, or C, and we refer to them
as "Point A," "Point B," and so on. While we
draw them as small dots, in reality, they are
imaginary locations that are infinitely small!
.
A
.
.
B
C
Page 4


PRIMARY 6
LINES AND ANGLES
Geometry starts with basic concepts like points,
lines, rays, line segments, and angles. These
fundamental ideas serve as the building blocks
of plane geometry. Understanding these basics
is important because they help us explore and
analyze more complex shapes and geometric
structures.
I N T R O D U C T I O N
Imagine making a tiny dot on your paper
with a sharp pencil. The sharper the tip, the
smaller the dot—this is similar to a point in
geometry. A point represents an exact
position but has no size, length, width, or
height—it’s just a location.
P O I N T
In geometry, we label points using capital
letters like A, B, or C, and we refer to them
as "Point A," "Point B," and so on. While we
draw them as small dots, in reality, they are
imaginary locations that are infinitely small!
.
A
.
.
B
C
A line segment has two endpoints, which we can
label as A and B. To understand this better, take a
piece of paper and mark two points, A and B. Now,
try connecting A to B using different routes.
Imagine folding a piece of paper and then unfolding
it. You’ll notice a crease where the fold was made—
this crease is like a line segment in geometry.
LINE SEGMENT
Which route is the shortest? The shortest path
between A and B is called a line segment. It includes
both points A and B, and these points are called the
endpoints of the line segment.
A
B
Page 5


PRIMARY 6
LINES AND ANGLES
Geometry starts with basic concepts like points,
lines, rays, line segments, and angles. These
fundamental ideas serve as the building blocks
of plane geometry. Understanding these basics
is important because they help us explore and
analyze more complex shapes and geometric
structures.
I N T R O D U C T I O N
Imagine making a tiny dot on your paper
with a sharp pencil. The sharper the tip, the
smaller the dot—this is similar to a point in
geometry. A point represents an exact
position but has no size, length, width, or
height—it’s just a location.
P O I N T
In geometry, we label points using capital
letters like A, B, or C, and we refer to them
as "Point A," "Point B," and so on. While we
draw them as small dots, in reality, they are
imaginary locations that are infinitely small!
.
A
.
.
B
C
A line segment has two endpoints, which we can
label as A and B. To understand this better, take a
piece of paper and mark two points, A and B. Now,
try connecting A to B using different routes.
Imagine folding a piece of paper and then unfolding
it. You’ll notice a crease where the fold was made—
this crease is like a line segment in geometry.
LINE SEGMENT
Which route is the shortest? The shortest path
between A and B is called a line segment. It includes
both points A and B, and these points are called the
endpoints of the line segment.
A
B
Imagine taking a line segment from A to B and
stretching it endlessly beyond A and B. This
extended version is what we call a line. Unlike a line
segment, a line has no endpoints and continues
forever in both directions.
A line is similar to a line segment, but instead of
stopping at two points, it extends infinitely in both
directions.
L I N E
That’s why you can never draw a complete picture
of a line—it has no limits! It’s like an endless road
which goes on forever!
A
B
.
.