Category Archives: Geometry

Building 3D solids and nets

Today we build 3D shapes from Go Frames.  This is what we know about 3D solids:

  • you name 3D shapes by their base

For example:  This is a hexagonal prism – the yellow base is a hexagon

Screen Shot 2016-02-24 at 2.07.49 PM

(photo cred to Jack)

 

This is a pentagonal prism – the orange base is a pentagon.

Screen Shot 2016-02-24 at 2.02.09 PM

(Photo cred to Sophie)

 

  • we name 3D shapes by the number of faces – for example, Gracie built a 12-sided shape called a “dodecahedron”

Screen Shot 2016-02-24 at 2.12.36 PM

    (Photo cred to Gracie)

  • any solid  that has many sides – is called a “polyhedron “- Nolan built a shape with 20 faces:

Screen Shot 2016-02-24 at 2.15.05 PM

(Photo cred to Nolan)

  • we tried to find out how you name solids with lots of faces like Nolan’s – you need to use Latin!

 

  • shapes with rectangular faces are called prisms:

Screen Shot 2016-02-24 at 2.20.35 PM

(Photo cred to Brae)

Screen Shot 2016-02-24 at 2.21.45 PMThis is a cube – it has 6 congruent square faces

(Photo cred to Quinn & Austin)

Screen Shot 2016-02-24 at 2.25.13 PMThis is a Hexagonal Prism – it has 6 congruent square faces and 2 congruent hexagonal faces

(Photo cred to Tuesday)

Screen Shot 2016-02-24 at 2.28.33 PM

This is Pentagonal Prism – it has 5 congruent square faces and 2 congruent pentagonal faces

(Photo cred to Brody)

  • shapes with triangular faces are called pyramids

Screen Shot 2016-02-24 at 2.07.01 PM

(Photo cred to Jasmine)

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(Photo cred to Brett)

Screen Shot 2016-02-24 at 2.04.53 PM

 

This is a square-based Pyramid – it has 4 congruent triangles and 1 square

(Photo cred to Bella & Abby)

  • 3d solids are made up of 2d shapes called faces

Here are some photos of us at work buiding 3D solids and nets: