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Question
(i) An ice-cream cone (ii) a cricket ball (iii) a glass tumbler (iv) a brick
Which of the above are polyhedrons?
(i) An ice-cream cone (ii) a cricket ball (iii) a glass tumbler (iv) a brick
Which of the above are polyhedrons?
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Solution
The correct option is D iv
A polyhedron is a three-dimensional shape having polygons as its faces usually joined by edges.
An ice cream cone is in the shape of a cone. A cricket ball is in the shape of a sphere. A glass tumbler has the shape of a cylinder. Cone, sphere, cylinder have a curved surface. So they do not come under the category of polyhedrons.
A brick has the shape of a cuboid. A cuboid has rectangular faces and no curved surface. All the faces of a cuboid are joined by edges. So it is a polyhedron.
iv
A polyhedron is a three-dimensional shape having polygons as its faces usually joined by edges.
An ice cream cone is in the shape of a cone. A cricket ball is in the shape of a sphere. A glass tumbler has the shape of a cylinder. Cone, sphere, cylinder have a curved surface. So they do not come under the category of polyhedrons.
A brick has the shape of a cuboid. A cuboid has rectangular faces and no curved surface. All the faces of a cuboid are joined by edges. So it is a polyhedron.
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