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Mathsight Class 7 Solutions Chapter 12 Representing 3D in 2D
Welcome to NCTB Solutions. Here with this post we are going to help 7th class students to solve MathSight Class 7 Mathematics Book, Chapter 12, Representing 3D in 2D. Here students can easily get all the exercise questions solution for Chapter 12, Representing 3D in 2D Exercise 12.1, 12.2, 12.3 and 12.4
Representing 3D in 2D Exercise 12.1 Solution :
Question no – (1)
Solution :
Figure – (a) have five faces.
Question no – (2)
Solution :
| Edges | Vertices | Faces | |
| A | 8 | 5 | 5 |
| B | 6 | 5 | 5 |
| C | 8 | 5 | 5 |
| D | 10 | 6 | 6 |
Question no – (3)
Solution :
Sphere and pyramid doesn’t have vertices
Question no – (4)
Solution :
Cylinder and cone look like a sharpened pencil.
Question no – (5)
Solution :
Pyramid and cuboid only have curved edges.
Question no – (6)
Solution :
| Edges | Vertices | Faces | |
| A | 10 | 5 | 6 |
| B | 10 | 6 | 5 |
| C | 16 | 8 | 9 |
Question no – (7)
Solution :
Yes, it has the same number of edges, faces, vertices, length and height.
Question no – (8)
Solution :
(a) Square → cube
(b) Rectangle → cuboid
(c) Circle → sphere
(d) Triangle → prism/pyramid.
Representing 3D in 2D Exercise 12.3 Solution :
Question no – (1)
Solution :
Question no – (2)
Solution :
Figure – (a) Hexagonal cylinder.
Figure – (b) Cone.
Figure – (c) Square.
Question no – (3)
Solution :
(a) → (iv)
(b) → (v)
(c) → (i)
(d) → (iii)
(e) → (ii)
Question no – (4)
Solution :
Question no – (5)
Solution :
Pentagonal prism →
Question no – (6)
Solution :
Dimension are not same. Because in Both case Base of prisms are square and rectangular individually.
Question no – (7)
Solution :
Representing 3D in 2D Exercise 12.4 Solution :
Question no – (1)
Solution :
Previous Chapter Solution :