polyhedron
Pronunciation: [ˌpɒlɪˈhɛdrən]
Word
Context: "geometry"
(noun) a three-dimensional shape that has flat surfaces, which are called faces. Each face is a polygon, like a triangle or square. Think of it as a solid that you can hold in your hands, like a box or a pyramid.
Example
A cube is a common example of a polyhedron because it has six flat square faces.
Example
A ball is not a polyhedron because it is not made of flat surfaces.
Example
Can you name some polyhedrons that we see in everyday life?
Context: "mathematics"
(noun) a solid figure with a specific number of sides, edges, and vertices. It's important in math because it helps us understand shapes in 3D space. You can use it to study how shapes look and behave.
Example
In our math class, we learned that a tetrahedron is a type of polyhedron with four triangular faces.
Example
A circle is not a polyhedron as it does not have flat surfaces or angles.
Example
How many faces does a specific polyhedron have?
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