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Question

Which of the following figure are a polyhedrons?
1. Ice-cream cone
2.cricket ball
3. Glass tumbler
4.brick
5.star

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Solution

Brick, Star(star polyhedron) and glass tumbler are examples of polyhedron.

A polyhedron is a 3-dimensional figure that is formed by polygons that enclose a region in space.

Examples of polyhedrons include a cube, prism, or pyramid.

Cones, spheres, and cylinders are not polyhedrons because they have surfaces that are not polygons.

To determine if a shape is polyhedron, we determine it through Euler formula
F+V = E+2
F-face, E- Edge and V- Vertices of the shape.


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