Chapter 15 Visualising Solid Shapes
Very Short Answer Type
If three cubes of dimensions 2 cm × 2 cm × 2 cm are placed end to end, what would be the dimension of the resulting cuboid?
Length of the resulting cuboid = 2 cm + 2 cm + 2 cm = 6 cm
Breadth = 2 cm
Height = 2 cm
Hence the required dimensions = 6 cm × 2 cm × 2 cm.
Answer the following:
(i) Why a cone is not a pyramid?
(ii) How many dimension a solid have?
(iii) Name the solid having one curved and two flat faces but no vertex.
(i) Cone is not a pyramid because its base is not a polygon.
Write down the number of edges on each of the following solid figures:
(iv) Triangular prism
What cross-section do you get when you give a horizontal cut to an ice cream cone?
Determine the number of edges, vertices and faces in the given figure.
Edges = 8
Vertices = 5
Faces = 5
Draw the sketch of two figure that has no edge.
Draw the sketches of two figures that have no vertex.
Name any three objects which resemble a sphere and cone.
Sphere: Football, Earth, Round table
Cone: Conical funnel, ice cream cone, conical cracker
What shape would we get from the given figure?
From the given net, we get a rectangular pyramid.
Short Answer Type
For the solids given below sketch the front, side and top view
Match the following:
(i) → (e)
(ii) → (a)
(iii) → (b)
(iv) → (c)
(v) → (d)
Complete the following table:
Draw a plan, front and side elevations of the following solids.
Name the solid that would be formed by each net:
(i) Triangular pyramid
(ii) Square pyramid
(iii) Hexagonal pyramid
Name the solids that have:
(i) 1 curved surface
(ii) 4 faces
(iii) 6 faces
(iv) 5 faces and 5 vertices
(v) 8 triangular faces
(vi) 6 triangular faces and 2 hexagonal faces.
(iii) Cube and cuboid
(iv) Square pyramid or rectangular pyramid
(v) Regular octahedron
(vi) Hexagonal prism.
Draw the top, side and front views of the given solids:
Draw the net of a cuboid having same breadth and height, but length double the breadth.
Draw the nets of the following:
(i) Triangular prisms