In these lessons, we will learn what is a prism. We will learn about rectangular prisms and triangular prisms. We aill alos learn the nets of prisms.
A prism is a 3-dimensional figure.
All prisms have faces, two of which are referred to as
bases. These two bases are parallel and may take the shape of any polygon.
The name of a prism refers to the shape of the bases, for example, triangular prism, rectangular prism, hexagonal
prisms. In Grade Four,
exploration is focused on rectangular prisms and triangular prisms
A rectangular prism has 6 faces, 12 edges and 8 vertices. Note that all square prisms (or cubes) can be called rectangular prisms because a square is a rectangle.
A triangular prism has 5 faces, 9 edges and 6 vertices.
A net is a 2-dimensional pattern of a 3-dimensional figure that can be folded to form the figure.
The following diagrams show the possible nets for a cube and also nets that cannot form a cube.
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