Geometry: 3-Dimensional Shapes
This week’s math is all about 3-dimensional shapes. Activities include recognize them, identify their properties, draw them, and build with them.
Activity #8a: About 3-D Shapes
Let’s begin by reviewing what we have been studying about 2-dimensional shapes. A 2-D shape is often called a flat shape. It lies on a flat surface. A 2-D shape has only 2 dimensions: length and height.
Then we will begin to learn about 3-dimensional shapes. A 3-D shape is often called a solid. It takes up space. A 3-D shape has 3 dimensions: length, height, and width.
When we talk about 3-D shapes there are words we need to know: face, curved face, base, edge, and vertex.
The face is the flat side of a solid. The curved face is the curved side of a solid. The base is the flat bottom side of a solid. The edge is where two faces meet. And the vertex is the point where several edges meet together.
Watch the video to review 2-D shapes and learn about 3-D shapes.
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3-D Shapes
There are many different 3-D shapes. The six 3-D shapes we are going to look at are sphere, cone, pyramid, cylinder, cube, and rectangular prism. The video explained how to identify these six different shapes.
Sphere: round ball.
Cone: base/bottom face is a circle, curved face meets at a point/vertex on top.
Pyramid: base/bottom face is square, sides are triangles which meet at a point/vertex on top.
Cylinder: circle face on top, circle face on bottom, curved face all around.
Cube: 6 sides/faces, all 6 are squares.
Rectangular prism: 6 sides/faces, all 6 are rectangles.
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3-Dimensional Shapes practice.
#1 Identifying 3-D shapes.
#2 Match the description to the 3-D shape.
#3 Matching 3-D shapes to real objects.
#4 Colouring 3-D shapes.
#5 Counting faces, edges, and vertices.
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Activity #8b: 3-Dimensional Real-life Objects
Before we go on a 3-D shape Scavenger Hunt, let’s review by singing along with this 3-D Shapes song.
Sing along with the video.
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Scavenger Hunt Activity
Your assignment is to go on a 3-D Shapes Scavenger Hunt. Print out the 3-D Shapes Scavenger Hunt recording page. Then go on a hunt around your home to see how many objects you can find for each 3-D shape. Record your finds with words or drawings.
Here are a few ideas to get you started:
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Activity #8c: 3-Dimensional Drawing
When we draw, people most often draw so their pictures look 2-dimensional. The objects in the drawings look flat. We are now going to learn how to draw shapes that actually look 3-dimensional.
Watch the video.
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Drawing 3-D Buildings Activity
Your assignment is to draw some 3-dimensional buildings. Materials you will need to draw with are a black marker and crayons. Print out the directions and graph paper below that you will use. Follow the basic directions to make your buildings appear 3-D but be creative with the details of your drawing (setting, doors, windows, etc.).
Directions:
Graph paper:
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Activity #8d: 3-Dimensional Building
Buildings in the real world are of course always 3-dimensional. We are going to fold together some paper shapes and place them together to create 3-dimensional paper buildings.
An architect is someone who designs structures such as office buildings, businesses, stadiums, schools, malls, and homes. The video you are going to watch was created by the architecture firm, Foster and Partners. It is called, What Makes a Building?
Click on the link below to watch the video:
https://www.fosterandpartners.com/news/archive/2020/04/what-makes-a-building-architecturefromhome/
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Building 3-D Buildings Activity
Your assignment is to create paper buildings or even an entire city. Materials you will need are pencil crayons, scissors, tape, and print outs of the building templates.
Directions:
Step 1: Print off the particular 3-D shape templates you wish to use for your buildings.
Step 2: Carefully cut out the templates.
Step 3: Decorate your buildings with windows, doors, and signs.
Step 4: Fold your building templates into 3-dimensional shapes, and tape together as needed.
Step 5: Arrange your buildings along roadways to create a city.
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***LAST WEEK’S ANSWERS: Identifying Angles***
***LAST WEEK’S ANSWERS: Telling Time using a.m. & p.m.***
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