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Standard VII
Mathematics
Visualising Solid Shapes
a Are sphere,...
Question
(a) Are sphere, cone and cylinder polyhedrons? Give reason for your answer.
(b) Match the 2-D figures with their names.
[4 MARKS]
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Solution
Each part: 2 Marks
(a) Sphere, cone and cylinder are not polyhedrons.
Sphere: Sphere has only one curved face and no polygons as faces. So it is not a polyhedron.
Cone: Cone has one circular face and the remaining part is a curved surface. So it is not a polyhedron.
Cylinder: Cylinder has two circular faces and the remaining part is a curved surface. So it is not a polyhedron.
(b) (i) - (b)
(ii) - (a)
(iii) - (e)
(iv) - (c)
(v) - (d)
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Similar questions
Q.
(a) Are sphere, cone and cylinder polyhedrons? Give reason for your answer.
(b) Match the 2-D figures with their names.
[4 MARKS]
Q.
Are sphere, cone and cylinder polyhedrons? Give reason for your answer [4 MARKS]
Q.
Which of the following is a polyhedron? Justify your answer.
(a) Cylinder (b) Cone (c) Square Pyramid (d) Sphere (e) Cube
Q.
Match the following:
(a) Area of a rectangle
(i) πr
2
(b) Area of a square
(ii) 4 × side
(c) Perimeter of a rectangle
(iii) l × b
(d) Perimeter of a square
(iv) (side)
2
(e) Area of a circle
(v) 2(l + b)
Q.
Match the columns I and II:
(A)(a) - (ii), (b) -(V), (c)-(iii),(d) -(i);(e)-(iv)
(B)(a)- (v), (b) -(iv), (c)-(iii),(d) -(ii),(e)-(i)
(C)(a) - (v), (b) -(i), (c) -(ii), (d) -(iv), (e) -(iii)
(D) (a)-(iii), (b)- (ii), (c) -(i), (d) -(v), (e) -(iv)
(E)
(a)-(i), (b) -(iv), (c) -(iii), (d) -(v), (e) -(ii)
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