Question
(a) Are sphere, cone and cylinder polyhedrons? Give reason for your answer.
(b) Match the 2-D figures with their names.
[4 MARKS]
(b) Match the 2-D figures with their names.
[4 MARKS]
Answer:
:
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 apolyhedron.
Cone: Cone has one circular face and the remaining part is a curved surface. So it is not apolyhedron.
Cylinder:Cylinderhas two circular faces and the remaining part is a curved surface. So it is not apolyhedron.
(b) (i) - (b)
(ii) - (a)
(iii) - (e)
(iv) - (c)
(v) - (d)
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:
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 apolyhedron.
Cone: Cone has one circular face and the remaining part is a curved surface. So it is not apolyhedron.
Cylinder:Cylinderhas two circular faces and the remaining part is a curved surface. So it is not apolyhedron.
(b) (i) - (b)
(ii) - (a)
(iii) - (e)
(iv) - (c)
(v) - (d)
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