11.3D VISUALIZATION
I. Choose the correct option.
1.The corners of a solid shape are called its ……
(A) vertices
(B) edges
(C) faces
(D) none of these
2.The line segments of solid shape are its ……
(A) vertices
(B) edges
(C) faces
(D) none of these
3.Flat surfaces of solid shape are called its edges. (True/False)
(A) vertices
(B) edges
(C) faces
(D) none of these
4.A cube has ……… diagonals.
(A) 2
(B) 12
(D) 10
(C)8
5.The number of vertices of a cuboid is ……….
(A)4
(B) 8
(C) 12
(D) 6
6.All the faces of a cube are……….
(A) rectangular shape (B) Square shape
(D) none of these
(C) Triangular shape
7.If a cuboid of dimensions 8 cm × 4 cm × 2 cm is melted and a cube is formed, what is the side of cube
formed
(A) 8 cm
(B) 4 cm
(C) 6 cm
(D) 2 cm
8.How many faces a cube has?
(A) 6
(B) 8
(C) 10
(D) 12
9.Fig (1) represents
(A) Cube
(B) Circle
(C) Rectangle
(D) Triangle
10.Which is /are two dimensional figures?
(i) Square
(A) 1, 2, only
(ii) Circle
(iii) Cube
(B) 1, 2, 3 only
(iv) Cuboid
(C) 2, 4 only
(D) All of these
11.Which is/are three dimensional figures in shape
(i) Sphere
(ii) Pyramid
(iii) Cylinder (iv) Rectangle
(A) 1, 2, only (B) 1, 2, 3, only
(C) 2, 3, 4 only
(D) All of these
12.The shape of following figure is known as
.
(A) Pyramid
(B) Cone
(C) Cylinder
(D) Cube
13.Name of the given figure is
(A) cube
(B) cuboid
(C) pyramid
(D) circle
14.If two cubes of sides 3 cm are placed side by side, what would the dimensions of the resulting cuboid
be?
(A) length = 4 cm, breadth = 2 cm, height = 3 cm
(B) length = 6 cm, breadth = 3 cm, height = 3
cm
(C) length = 8 cm, breadth = 4 cm, height = 4 cm
(D) length = 10 cm, breadth = 5 cm, height = 5
cm
15.What is the difference between a reactangle and a cube?
(A) Reactangle is 3-dimension and cube is 2-dimension
dimension
(C) Reactangle is 2-dimension and cube is 3-dimension
16.How many vertices a cube has?
(A) 4
(B) 6
(C) 8
(D) 12
17.How many edges a cube has?
(A) 8
(B) 10
(C) 12
(D) 16
18.Identify the net which can be used to make cubes.
(B) Reactangle and cube are both 2(D) None of these
(A)
(B)
(C)
(D)
19.Match the nets with appropriate solids.
(a)
(i)
(b)
(c)
(iii)
(A) a - 1; b - 2; c - 3; d - 4
(C) a - 4; b - 3; c - 2; d - 1
(d)
(B) a - 2; b - 3; c - 4; d - 1
(D) a - 4; b - 1; c - 3; d - 2
(ii)
(iv)
20.If two cubes of dimension 2 cm by 2cm by 2 cm are placed side by side what would be the dimensions
of cuboid be ?
(A) 4 cm × 4 cm × 4 cm
(B) 8 cm × 8 cm × 8 cm
(C) 8 cm × 6 cm × 4 cm
(D) 4 cm × 2 cm × 2 cm
21.What solid do you get when you give a vertical cut of a cubical brick of dimensions 2cm × 2cm × 4cm
along 4 cm side.
(A) Cuboid
(B) Sphere
(C) Triangle
(D) None of these
22.If two cuboids of dimension 3 cm × 3 cm × 6 cm are placed side by side, what would be the dimension
of the resulting figure be.
(A) 3 cm × 3 cm × 6 cm
(B) 6 cm × 3 cm × 6 cm
(C) 6 cm × 3 cm × 3 cm
(D) 9 cm × 9 cm × 9 cm
23.Vertex of the given figure are
(A) only A and B
(B) only G and D
(C) A, B, C, D, E, F, G and H
(D) none of these
24.A cylinder has two faces which is …………
(A) triangle
(B) circle
(C) sphere
(D) square
25.Faces of the cube are in the shape of
(A) square
(B) reactangle
(C) triangle
26.What is the base of the cone?
(A) Square
(B) circle
(D) circle
(C) triangle
27.Which statement is false in the following statement
(A) A triangle has three sides.
reactangle.
(C) Faces of the cube are in the shape of square.
(D) reactangle
(B) Faces of the cuboid are in the shape of
(D) A cylinder has four faces which are circles.
28.The given figure is known as
(A) Rectangle
(B) square
(C) quadrilateral
(D) none of these
(C) quadrilateral
(D) triangle
29.What is the name of given figure?
(A) circle
(B) sphere
30.What is the difference between cube and cuboid?
(A) No difference between cube and cuboid
(B) A cube has equal length, breadth and height and a cuboid has not equal length, breadth and height
(C) A cube has not equal length, breadth and height and a cuboid has equal length, breadth and height
(D) None of these
31.Which statement is false in the following statements?
(A) Reactangle is 2-dimension shape. (B) Pyramid is 3-dimension shape.
(C) Circle is 2-dimension shape.
(D) Cone is 2-dimension shape.
32.If we rotate a right triangle about his height then we get a ……….
(A) cube
(B) cuboid
(C) Cone
(D) reactangle
33.Pyramid is a
a)3D object
d)4Dobject
[
]
b)2D object
c) 1D object
34.The cricket ball is a example of
a)Sphere
b)Cube
[
35.Cone is a
[
]
a)2D object b)3D object c)4D object
36.Number of edges on a triangle
a)4 b)2 c)3 d)1
]
c)Cuboid
d)Rectangle
d)6D object
[ ]
37.The line is an example of a ------ figure
[ ]
a)One -dimentional b)Two-dimentional c)Three-dimentional d)Four-dimentional
38.The cone has ----- number of vertices
a)2 b)1 c)3 d)4
[ ]
II. Solve the following problems.(2M)
1.From the following nets which can be used to make cubes.
2.Can this be a net for a die? Explain your answer.
3.If two cubes of dimensions 2cm by 2cm are placed side by side, what would the dimension of the
resulting cuboid be?
4.Write the name of the shapes representd by the following objects
a)Tennins ball b)Dice c)Birth day cap d)Tube light
]
5.Draw the following figures on squared and isometric sheets
a) a cube with dimensions 3x3x3
b)a cubiod made by joining two cubes of dimension 2x2x2 each
III. Solve the following problems.(3M)
1.Here is an incomplete net for making a cube. Complete it in at least two different ways.
2.Match the nets with appropriate solids:
3.What cross - section will we get when we cut each of the following solids horizontally and vertically ?
a)Dice b)Foil roll c) Ice cream d)Foot ball
IV. Solve the following problems.(4M)
1.Draw the nets for the following objects
a)A cuboid with dimentions 4x3x2
b)A cuboid made by joining two cubes of dimentions 2x2x2 each
c)An ice-cream cone
d)A water pipe
2.What cross-sections do you get when you give a
i) vertical cut ii) horizontal cut to the following solids
a) A brick
b) A round apple
c) A die
d) A circular pipe