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Polyhedrons and their Nets
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Triangular Prism 5 faces 2 congruent triangles 3 rectangles
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Triangular Pyramid (tetrahedron)
4 faces 4 congruent triangles
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Rectangular Prism 6 faces 3 pairs of congruent rectangles
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Rectangular Pyramid 5 faces 2 pairs of congruent triangles 1 rectangle
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Pentagonal Prism 7 faces 2 congruent pentagons 5 congruent rectangles
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Pentagonal Pyramid 6 faces 1 pentagon 5 congruent triangles
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Hexagonal Prism 8 faces 2 hexagons 6 congruent rectangles
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Hexagonal Pyramid 7 faces 1 hexagon 6 congruent triangles
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Prism definition A solid figure with:
two congruent and parallel faces that are polygons The rest of the faces are rectangles The number of sides that the polygon has at the base tells the number of rectangles
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Pyramid definition A solid figure with: A polygon as the base
The rest of the faces are triangles that share one vertex It is named for its base
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Prisms and Pyramids in real life
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Prisms and Pyramids in real life
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Prisms and Pyramids in real life
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Textbook Page 180 #5 Match the net to the 3D object
Triangular pyramid (tetrahedron)
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Match the net to the 3D object
Textbook Page 180 #5 Match the net to the 3D object Triangular prism
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Match the net to the 3D object
Textbook Page 180 #5 Match the net to the 3D object Hexagonal prism
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Textbook Page 180 #5 Match the net to the 3D object
Cube with a square based pyramid on top
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Textbook Page 181 #7 Is this the net of a right octagonal prism? 1 2 1
All the required faces are present but not in the correct locations.
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Textbook Page 223 #2a What does this net form? Hexagonal Prism
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Textbook Page 223 #2b What does this net form? Cube
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Textbook Page 223 #2c What does this net form? Cylinder
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Textbook Page 223 #2d What does this net form? Pentagonal Pyramid
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Textbook Page 223 #3a Which one is a net? How can we fix this one?
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Yes! Pentagonal Pyramid
Page 223 #4a Is it a net? Yes! Pentagonal Pyramid
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Yes! Triangular pyramid
Page 223 #4b Is it a net? Yes! Triangular pyramid
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It can be the net of a right triangular prism
Page 223 #4c Is it a net? No! But if we change it . . . It can be the net of a right triangular prism
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Page 226 #3 Which diagrams are nets of cylinders?
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