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What is a concave polyhedron?
Formally, a polgon is concave if there is at least one pair of points in (or on) the polyhedron such that the straight line joining the two points is not wholly inside (or on) the polyhedron.In less formal terms, a concave polygon is one which has a bit going inwards.
What do you use to focus the sun rays concave mirror or convex mirror?
A concave mirror is used to focus sun rays. Concave mirrors converge reflected light towards a focal point, making them ideal for harnessing sunlight for applications like solar cooking or solar power generation.
Does the paper starts burning if we put a concave mirror on it facing the sun and why?
Yes, the paper can start burning if a concave mirror focuses the sunlight onto it. This is because the concave mirror can concentrate the sun's rays onto a smaller area, increasing the intensity of the heat and causing the paper to ignite.
The edge of a polyhedron are the polygons which bound the polyhedron?
No, they are the faces of the polyhedron.
What makes a polyhedron faceted?
The definition of polyhedron. If it was not faceted it would not be a polyhedron.
How do you represent a solid in math?
One way which will work for a convex polyhedron is to list the coordinates of each of its vertices. However, this method will not work not non-concave polyhedra of solid shapes which have one or more curved surfaces.
Is a rectangle a polyhedron?
yes it is a polyhedron
What is the area of an icosikaitera?
Icosikaitetra (not icosikaitera) is an adjective that means 24. The question does not specify whether it is a polygon with 24 sides or a polyhedron with 24 faces. Even if it were known that it was a polygon, there is no information on its shape - it can be convex or concave, small or huge.
What are the flat sides of a polyhedron?
They are the faces of the polyhedron.
Is a cubiod a polyhedron?
No, a cubiod is not a polyhedron but a cuboid is.
Can a concave lens start a fire with the aid of the sun?
No, a concave lens cannot start a fire with the aid of the sun. Concave lenses cause light rays to diverge, which would spread the sunlight out rather than concentrate it to create enough heat to start a fire. For starting a fire with a lens, a convex lens or a magnifying glass is usually used to focus sunlight to a point.
The edges of a polyhedron are polygons which bound the polyhedron?
False
