2D & 3D shapes

2D & 3D shapes

​Learning objectives

• ​Increase confidence with numbers for those needing the first steps towards formal numeracy qualifications  

• Explore and recognise 2D&3D shapes

• Explore and recognise symmetry in nature

Open Ended

Why have you chosen to do this course?

Poll

How will doing this course help you to progress?

• Employment

• Volunteering

• Further learning

• Other

Open Ended

Do you feel you need additional support to complete this course?

Poll

How confident do you feel to differentiate 2D & 3D shapes on a scale from 1-4?

• 1

• 2

• 3

• 4

Poll

How familiar are you with symmetrical & unsymmetrical shapes?

• 1

• 2

• 3

• 4

​What are the dimensions?

​Dimensions in mathematics are the measure of the size or distance of an object or region or space in one direction.

Dimensions are expressed as:

·     Length                             

·     Width

·     Height

·     depth

​How many dimensions are there?

​Shapes can be classified based on the numbers of dimensions in the shape.

• Zero – dimensional

• One – dimensional (1D)

• Two – dimensional (2D)

• Three – dimensional (3D)

​Types of dimensions

​Zero dimensional- A point is a zero-dimensional object as it has no length, width, or height.  It has no size. It tells about the location only. 

 

One dimensional - Only a single measurement is possible for a one-dimensional figure. A line segment drawn on a surface is a one-dimensional object, as it has only length and no width.

​Types of dimensions

​Two-dimensional– The shapes that have two dimensions – length and width.  Two-dimensional or 2-D shapes do not have any thickness and can be measured in only two faces. 2D shapes are flat. 2D shapes have sides and vertices (corners).

​Properties of 2D shapes

​Properties of 2D shapes

​

​3D shapes

​3- dimensional (3D) shapes are solid shapes. They have 3 dimensions – length, width, and height.

3D shapes have faces, edges and vertices.

               

• ​  A face is a flat surface.

•  An edge is where two faces meet.

• A vertex is a corner where edges meet. The plural is vertices.

​A 3D shape will always occupies space.

​Examples of 3D shapes

​Properties of 3D shapes

Multiple Choice

Name this 3 sided 2D shape

• Square

• Circle

• Pyramid

• Triangle

Multiple Choice

Name this shape...

• Sphere

• Circle

• Cylinder

• Pyramid

Multiple Choice

What is the name of this 3D shape? An example of a real world object is a can.

• Circle

• Triangle

• Cylinder

• Cube

Multiple Choice

What shape is this Rubic's Cube?

• Square

• Rectangle

• Cube

• Circle

Multiple Choice

Most balls are 3D shapes? What shape?

• Circle

• Cylinder

• Sphere

• Cone

Multiple Choice

What does "quad" mean?

• 1

• 4

• 5

• 10

Multiple Choice

Identify the shape

• square

• rectangle

• rhombus

• trapezoid

Multiple Choice

Identify the shape

• pentagon

• hexagon

• octagon

• rectangle

Multiple Choice

How many sides does a pentagon have?

• 1

• 3

• 5

• 7

Multiple Choice

Identify the shape

• cone

• cube

• pyramid

• cylinder

​Sorting everyday shapes

​• Sort the items into cylinders, cubes, and cuboids

• Add three other everyday examples of your own

​Cylinder	​Cubes	​Cuboids
​	​	​
​	​	​

​What is symmetry?

​Symmetry is when a shape can be folded over a straight line to make a mirror image of itself.

Something is symmetrical when it is same on both sides. Asymmetrical objects or shapes are not the same on both sides.

But symmetry often comes up in art and design activities too.

​Lines of symmetry

​Butterflies are symmetrical creatures!

​If butterflies were folded in half, they would have the same shape and pattern on both sides.

Butterflies have 1 lines of symmetry.

​How can you find out if a shape is symmetrical?

​Symmetry in the mirror

​https://youtu.be/PiOa_vWKJA4

​Method of finding out if a shape tesselate

Home

Open in new tab

Copy link

Multiple Choice

Which of these images represents a tessellation?

Multiple Choice

Non-polygonal figures can also make tessellations.

• Yes, they can.

• No, they can't.

Multiple Choice

Can you find tessellations in nature?

• Yes, I can find them in nature.

• No, I can not find them in nature.

Multiple Choice

This figure is a tessellation.

• True

• False

Multiple Choice

What shapes make up the tessellation in the image?

• Triangles and Squares

• Triangles and Rectangles

• Triangles and Triangles

• Triangles and Hexagons

Poll

How confident do you feel to differentiate 2D & 3D shapes on a scale from 1-4?

• 1

• 2

• 3

• 4

Poll

How familiar are you with symmetrical & unsymmetrical shapes?

• 1

• 2

• 3

• 4