A Are sphere- cone and cylinder polyhedrons- Give reason for your answer-b Match the 2-D figures with their names-ia Circleiib Rectangleiiic Squareivd Quadrilateralve Triangle-4 MARKS-

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Byju's Answer

Standard VIII

Mathematics

Polyhedrons

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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(a) Are sphere, cone and cylinder polyhedrons? Give reason for your answer. (b) Match the 2-D figures with their names. [4 MARKS]

(a) Are sphere, cone and cylinder polyhedrons? Give reason for your answer.

(b) Match the 2-D figures with their names.

[4 MARKS]