Questions and Answers
What is a characteristic that distinguishes 3D shapes from 2D shapes?
What is the purpose of the volume formula in 3D shapes?
What is a common feature of pyramids?
What is another name for a rectangular prism?
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What is an example of a 3D shape that can lie on its sides?
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How many sides can the base of a pyramid have?
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What is a common example of a 3D shape found in daily life?
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What is a characteristic of a cube?
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What is an example of a sphere?
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What is a characteristic of a prism?
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What is an example of a cone?
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What is a polyhedron?
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What is a characteristic of a cylinder?
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What is a torus?
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What is a characteristic of a rectangular prism?
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Study Notes
What are 3D Shapes?
- A 3-dimensional shape is any solid object with three distinct dimensions (length, width, and height).
- 3D shapes occupy volume and have thickness or depth, unlike 2D shapes.
- Examples of 3D shapes include Torus, Sphere, Cylinder, Cube, Cone.
Types of 3D Shapes
Pyramid
- A pyramid is a solid object with triangular sides converging to a point at the top of the shape.
- The base of a pyramid can have three or more sides.
- Examples of pyramids include the pyramids built in ancient Egypt.
Rectangular Prism or Cuboid
- A rectangular prism is a four-sided object that adds a third dimension to a rectangle.
- Opposite sides of a rectangular prism are equal.
- Examples of rectangular prisms include a mattress.
Cube
- A cube is a solid object that adds a third dimension to a square.
- A cube has all equal sides.
- Examples of cubes include a cardboard box or dice.
Sphere
- A sphere is a solid object that originates from a circle.
- A sphere will roll around due to its round form.
- Examples of spheres include a soccer ball.
Cylinder
- A cylinder adds a third dimension to a circle.
- A cylinder has a circle on either side of the shape.
- Examples of cylinders include a can of soup.
Cone
- A cone is an object with a circular base and a height that extends as a third dimension.
- The circular base comes up to a point, like a pyramid.
- Examples of cones include an ice cream cone.
Other 3D Shapes
Torus
- A torus is a 3D shape that is formed by placing a larger circle around a smaller circle to form a three-dimensional circular shape.
- A torus has no vertices or edges.
- Examples of toruses include a donut or a tire.
Prisms
- A prism is a solid object with identical shapes at the opposite ends, with flat parallelogram sides.
- Examples of prisms include a rectangular prism, square prism, triangular prism, or pentagonal prism.
Polyhedrons
- A polyhedron is a 3D shape that has one or more polygons on all of its sides, with edges and sharp vertices.
- Examples of polyhedrons include a cube, prism, pyramid, tetrahedron, octahedron, dodecahedron, and icosahedron.
Identifying Properties of 3D Shapes
Cube
- 6 total sides
- All sides are squares, and all sides are equal.
Sphere
- Perfectly symmetrical
- No edge or vertices
Cylinder
- Flat, circular base and identical top
- Base and top are parallel
- One round, curved side
Rectangular Prism
- Six rectangular sides
- Opposite sides are parallel and are the same size
- All sides are not equal
Cone
- One circular base
- One pointed top
- One curved, rounded side
Pyramid
- A polygonal base
- Triangular sides that come up to a pointed top
Torus
- Circular shape
- Empty, hollow center
Prism
- Identical shapes at opposite ends of the object
- Multiple flat sides
Polyhedron
- No round edges or sides
- Multiple flat sides in the shape of a polygon
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Description
Learn about 3-dimensional shapes, their characteristics, and different types of 3D shapes, including pyramids.