pentagonal prism - dps.org.zadps.org.za/.../04/grade4_maths_3d_objects_11_15may.pdf · and fold it...
TRANSCRIPT
Pentagonal prismPentagonal prism
Triangular Triangular
pyramidpyramid
Square based
pyramid
A NET is when we unfold the A NET is when we unfold the
FACES of a 3D objectFACES of a 3D object
cubecube
Triangular prismTriangular prism
Homework: Act 1 p 138 no 1 & 4
No 1 try to make these nets at home
and fold it into a 3D object
No 4 Compare the nets with the 3d objects given
in question 4
Match them eg 4a looks like no 1q
Look again at
slides 2, 3,&
4 to help you
Day 2: Act 2 p 139 no 3
The 2D shapes
you can see in
each 3D object
Squares
Rectangles
Triangles
Hexagon
PentagonPentagon
Circle
Homework:
Day 3 Act 3 p 140 no 1 & 3
Day 4: Try to make 3d-objects
Use tooth picks and Prestik
or Jelly Tots
The amount of Tooth pics
you need for each object
will be referred to as Edges.
For instance use 12 Tooth pics
for the cube.
The amount of Prestik balls
you need will be referred to as
Vertices
For the cube you will need 8 balls
of prestik
Day 4 continue
Make the following 3D objects.
cube Rectangular
prism
Triangular
pyramidNo of
Toothpicks12 8 short (cut Tooth
pics in halve to make
the short sides)
4 normal size tooth pics
6
No of Prestik
balls8 8 4
Take a photo on your tablet of your complete
Tooth pic models
If you enjoyed making 3D models you can try to make
all the objects in the table on the last slide
12 122 18
8 6 91
Name surfaces Faces Edges Vertices
cube Flat only 6
squares
12 8
Rectangular
Prism
Trangular
Prism
Triangular
pyramid
Square based
pyramid
Cylinder
Cone
Sphere
3D objects and their featuresDay 5:
Complete this table
in your jotter
Edges = number of
tooth pics/sides
Surface = flat / curved
Faces = 2D shapes in
the object
Vertices = number of
prestic balls /corners