NCERT Textbook: Shapes and Angles | Mathematics for Class 5: NCERT PDF Download

 Page 1


16
It is important to encourage children to think about the way in which shapes can differ even
when the number of sides is the same. This will help them to get a sense of how angles
determinetheshapeofapolygon.
17
Oh! So let us look
for the angles.
If you ask for the
angles that the
matchsticks make at the
corners, you can do it.
Wow! When the angle
changes the shape
changes so much.
See, how the matchsticks
make a small angle , a
big angle , and a
bigger angle .
Rohini Mohini
Rohinimadethisshape.
Mohini—Isitaclosedshapeoranopenshape?
Rohini Itisaclosedshape.
Mohini Howmanysidesarethere?
Rohini Ithas6sides.
Mohinimadethis.
Nowyougivetheanswers.
—
—
—
Oh! That is
so simple.
2
Shapes and Angles
Rohini and Mohini are twin sisters. They love doing the same
things.Onedaywhentheyweremakingshapeswithmatchsticks,
Shailagavethemachallenge.
Rohini will make a shape.
Mohini has to make the
same without looking at it,
but she can ask questions.
Isitaclosedshape? Doesithave
6sides? .
sameastheonemadeby
Rohini SoMohinitriedagain.
Thisiswhatshemade.
_______.
Butitisnotthe
.
________
Reprint 2024-25
Page 2


16
It is important to encourage children to think about the way in which shapes can differ even
when the number of sides is the same. This will help them to get a sense of how angles
determinetheshapeofapolygon.
17
Oh! So let us look
for the angles.
If you ask for the
angles that the
matchsticks make at the
corners, you can do it.
Wow! When the angle
changes the shape
changes so much.
See, how the matchsticks
make a small angle , a
big angle , and a
bigger angle .
Rohini Mohini
Rohinimadethisshape.
Mohini—Isitaclosedshapeoranopenshape?
Rohini Itisaclosedshape.
Mohini Howmanysidesarethere?
Rohini Ithas6sides.
Mohinimadethis.
Nowyougivetheanswers.
—
—
—
Oh! That is
so simple.
2
Shapes and Angles
Rohini and Mohini are twin sisters. They love doing the same
things.Onedaywhentheyweremakingshapeswithmatchsticks,
Shailagavethemachallenge.
Rohini will make a shape.
Mohini has to make the
same without looking at it,
but she can ask questions.
Isitaclosedshape? Doesithave
6sides? .
sameastheonemadeby
Rohini SoMohinitriedagain.
Thisiswhatshemade.
_______.
Butitisnotthe
.
________
Reprint 2024-25 Reprint 2024-25
Page 3


16
It is important to encourage children to think about the way in which shapes can differ even
when the number of sides is the same. This will help them to get a sense of how angles
determinetheshapeofapolygon.
17
Oh! So let us look
for the angles.
If you ask for the
angles that the
matchsticks make at the
corners, you can do it.
Wow! When the angle
changes the shape
changes so much.
See, how the matchsticks
make a small angle , a
big angle , and a
bigger angle .
Rohini Mohini
Rohinimadethisshape.
Mohini—Isitaclosedshapeoranopenshape?
Rohini Itisaclosedshape.
Mohini Howmanysidesarethere?
Rohini Ithas6sides.
Mohinimadethis.
Nowyougivetheanswers.
—
—
—
Oh! That is
so simple.
2
Shapes and Angles
Rohini and Mohini are twin sisters. They love doing the same
things.Onedaywhentheyweremakingshapeswithmatchsticks,
Shailagavethemachallenge.
Rohini will make a shape.
Mohini has to make the
same without looking at it,
but she can ask questions.
Isitaclosedshape? Doesithave
6sides? .
sameastheonemadeby
Rohini SoMohinitriedagain.
Thisiswhatshemade.
_______.
Butitisnotthe
.
________
Reprint 2024-25 Reprint 2024-25
18
3) Four different angles are marked in four colours. Can you find 
other angles which are the same as the one marked in red? 
Mark them in red. Do this for the other colours.
Practice Time
1) Look at the shape and answer.
 The angle marked in ________ colour is the biggest angle. h
2 (a) Are the angles marked with yellow equal? ________
 b) Are the angles marked with green equal? ________
c) Are the angles marked with blue equal? ________
Reprint 2024-25
Page 4


16
It is important to encourage children to think about the way in which shapes can differ even
when the number of sides is the same. This will help them to get a sense of how angles
determinetheshapeofapolygon.
17
Oh! So let us look
for the angles.
If you ask for the
angles that the
matchsticks make at the
corners, you can do it.
Wow! When the angle
changes the shape
changes so much.
See, how the matchsticks
make a small angle , a
big angle , and a
bigger angle .
Rohini Mohini
Rohinimadethisshape.
Mohini—Isitaclosedshapeoranopenshape?
Rohini Itisaclosedshape.
Mohini Howmanysidesarethere?
Rohini Ithas6sides.
Mohinimadethis.
Nowyougivetheanswers.
—
—
—
Oh! That is
so simple.
2
Shapes and Angles
Rohini and Mohini are twin sisters. They love doing the same
things.Onedaywhentheyweremakingshapeswithmatchsticks,
Shailagavethemachallenge.
Rohini will make a shape.
Mohini has to make the
same without looking at it,
but she can ask questions.
Isitaclosedshape? Doesithave
6sides? .
sameastheonemadeby
Rohini SoMohinitriedagain.
Thisiswhatshemade.
_______.
Butitisnotthe
.
________
Reprint 2024-25 Reprint 2024-25
18
3) Four different angles are marked in four colours. Can you find 
other angles which are the same as the one marked in red? 
Mark them in red. Do this for the other colours.
Practice Time
1) Look at the shape and answer.
 The angle marked in ________ colour is the biggest angle. h
2 (a) Are the angles marked with yellow equal? ________
 b) Are the angles marked with green equal? ________
c) Are the angles marked with blue equal? ________
Reprint 2024-25 Reprint 2024-25
Page 5


16
It is important to encourage children to think about the way in which shapes can differ even
when the number of sides is the same. This will help them to get a sense of how angles
determinetheshapeofapolygon.
17
Oh! So let us look
for the angles.
If you ask for the
angles that the
matchsticks make at the
corners, you can do it.
Wow! When the angle
changes the shape
changes so much.
See, how the matchsticks
make a small angle , a
big angle , and a
bigger angle .
Rohini Mohini
Rohinimadethisshape.
Mohini—Isitaclosedshapeoranopenshape?
Rohini Itisaclosedshape.
Mohini Howmanysidesarethere?
Rohini Ithas6sides.
Mohinimadethis.
Nowyougivetheanswers.
—
—
—
Oh! That is
so simple.
2
Shapes and Angles
Rohini and Mohini are twin sisters. They love doing the same
things.Onedaywhentheyweremakingshapeswithmatchsticks,
Shailagavethemachallenge.
Rohini will make a shape.
Mohini has to make the
same without looking at it,
but she can ask questions.
Isitaclosedshape? Doesithave
6sides? .
sameastheonemadeby
Rohini SoMohinitriedagain.
Thisiswhatshemade.
_______.
Butitisnotthe
.
________
Reprint 2024-25 Reprint 2024-25
18
3) Four different angles are marked in four colours. Can you find 
other angles which are the same as the one marked in red? 
Mark them in red. Do this for the other colours.
Practice Time
1) Look at the shape and answer.
 The angle marked in ________ colour is the biggest angle. h
2 (a) Are the angles marked with yellow equal? ________
 b) Are the angles marked with green equal? ________
c) Are the angles marked with blue equal? ________
Reprint 2024-25 Reprint 2024-25 Reprint 2024-25