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Building 3D Shape Models
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Building 3D Shape Models
A community garden needs a model of a lookout tower. Use your knowledge of 3D objects to plan and check a sturdy design. Read each question carefully; some ask you to explain your thinking.
Plan and identify
1.The tower’s four supports are long and round, with two flat circular ends. Which 3D object should you choose for the supports?
- Cone
- Cylinder
- Sphere
- Cube
2.The platform is a rectangular prism. How many faces, edges and vertices does it have?
3.The roof is a cone. Name its one flat face and describe its curved surface.
4.A builder says, “A cube and a rectangular prism both have 6 faces.” Is the statement true or false? Give one more fact that supports your answer.
TrueFalse
Solve the model puzzles
5.The model uses 4 cylinders as supports and 1 cone as a roof. How many of these 3D objects are used altogether?
6.Which part of the lookout tower model could roll most easily on a flat table, and why?
7.Mei has one cube-shaped box and one rectangular-prism box. What is one way these objects are alike, and one way they can be different?
8.Choose the best object for each model part: a round tree trunk, a pointed roof, and a sturdy box-shaped base. Use each object once: cylinder, cone, rectangular prism.
- Round tree trunk
- Pointed roof
- Box-shaped base
- Cone
- Cylinder
- Rectangular prism
9.A student wants to make a tower that stands firmly without tipping. Which is the better design: a wide rectangular-prism base or a narrow cone base? Explain your choice.
10.Sketch a different small garden structure using at least three 3D objects. Label each object by its name and write one sentence explaining how the shapes fit together.
2 printable pages
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