Lesson Page
Patterns &
Functions |
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| Pyramids
have: |
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- triangular
side faces that meet at one vertex
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| A
face is a flat surface. On prisms and pyramids faces
are polygons.
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| An
edge is a line formed
by two faces.
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| A
vertex is the point
where two or more edges meet. |
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Example 1: |
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Name the 3-dimensional figure.
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The dice are a
cube, which is a
prism.
They have 6 flat face, 12 edges, and 8 vertices.
A prism has to have
2 congruent sides,
and rectangular side faces.
Dice have 2 congruent sides,
and rectangular side faces,
so that makes dice a prism.
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Example 2: |
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Name the 3-dimensional figure. |
This tent is a
triangular pyramid.
It has 5 flat face, 8 edges, and 5 vertices.
A triangular pyramid
has to have 1 base,
and triangular side faces
that meet at one vertex.
This tent has 1 base,
and triangular side faces
that meet at one vertex, so that makes this tent a
triangular pyramid. |
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Remember:
Prisms have:
- 2
congruent bases
-
rectangular side faces
Pyramids
have:
- 1 base
-
triangular side faces that meet at one vertex
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