YEAR 2 · MATHS
Lia's Maths Book
Shape · 2-D and 3-D shape names
- Part 1 · 2-D shapes: sides and vertices
- Part 2 · 3-D shapes: faces, edges and vertices
Lia's Maths Book · 2-D and 3-D Shape Names · liabooks.com/study1
Part 1
2-D shapes: sides and vertices
Name:
Today I will: say how many sides and vertices a shape has.
Maths words todaysidevertexverticespentagonhexagon
My shape words
- straightnot bent, like a straw
- curvedbending, like a piece of string
- sidea straight line of a flat shape
- vertexwhere two sides meet. In maths, a corner is a vertex.One vertex. Three vertices.
1
Name the shape. How many sides? How many vertices?
a
Name:
sidesvertices
b
Name:
sidesvertices
c
Name:
sidesvertices
d
Name:
sidesvertices
e
Name:
sidesvertices
f
Name:
sidesvertices
g
Name:
sidesvertices
h
Name:
sidesvertices
i
Name:
sidesvertices
j
Name:
2
Think about it.
a
A shape has 5 straight sides. How many vertices does it have?vertices
b
Mum turns a square around. How many sides does it have now?sides
c
An octagon has 8 straight sides. How many vertices does it have?vertices
Say it!It is a . I know because it has straight sides.
How did I do?
- I can say straight and curved.
- I can say side and vertex.
- I can name a pentagon and a hexagon.
- I know a turned square is still a square.
Lia's Maths Book · 2-D and 3-D Shape Names · liabooks.com/study2 (continued)
Part 2
3-D shapes: faces, edges and vertices
Name:
Today I will: say how many faces, edges and vertices a 3-D shape has.
Maths words todayfacecurved surfaceedgevertexcuboidcubepyramid
My shape words
- facea flat surface of a 3-D shape
- curved surfacethe curved part of a sphere, a cylinder or a cone
- edgewhere two faces meetIn 3-D shapes, each straw is an edge.
- vertexwhere edges meet
1
Name the 3-D shape. Which 2-D shape is on its flat faces?
a
Name:
Faces:
flat faces
b
Name:
Faces:
flat facesedgesvertices
c
Name:
Faces:
flat facesedgesvertices
d
Name:
Faces:
flat facesedgesvertices
e
Name:
Faces:
f
Name:
g
Name:
Use a dice, a box or your straw pyramid to help.
2
Think about it.
Hugo can see 3 faces of a box. How many flat faces does the box have?faces
Say it!A curved surface helps it . Flat faces help it .
Say it!It is a . I know because .
How did I do?
- I can tell a flat face from a curved surface.
- I can say face, edge and vertex.
- I know a dice is a cube, not a square.
- I can find the faces I cannot see.
Lia's Maths Book · 2-D and 3-D Shape Names · liabooks.com/study3 (continued)
Answers
Part 1 · 2-D shapes: sides and vertices
- 1a
- triangle, 3 sides, 3 vertices
- 1b
- triangle, 3 sides, 3 vertices
- 1c
- square (a special rectangle), 4 sides, 4 vertices. Turn it around. Same shape, same name!
- 1d
- rectangle, 4 sides, 4 vertices
- 1e
- pentagon, 5 sides, 5 vertices
- 1f
- pentagon, 5 sides, 5 vertices
- 1g
- hexagon, 6 sides, 6 vertices
- 1h
- hexagon, 6 sides, 6 vertices
- 1i
- octagon, 8 sides, 8 vertices
- 1j
- circle. Its outline has no straight parts.
- 2a
- 5 vertices. It is a pentagon, even with sides of different lengths.
- 2b
- 4 sides. It is still a square. Turn it around. Same shape, same name!
- 2c
- 8
Part 2 · 3-D shapes: faces, edges and vertices
- 1a
- cuboid, 6 flat faces, flat faces: rectangle. Three you can see, three hiding.
- 1b
- cube (a special cuboid), 6 flat faces, 12 edges, 8 vertices, flat faces: square
- 1c
- pyramid, 5 flat faces, 8 edges, 5 vertices, flat faces: triangle. Four triangle faces meet at the top vertex. The bottom is a square.
- 1d
- pyramid, 4 flat faces, 6 edges, 4 vertices, flat faces: triangle. The bottom is a triangle too.
- 1e
- cylinder, flat faces: circle. Two flat faces and a curved surface.
- 1f
- cone. A flat circle and a curved surface.
- 1g
- sphere. One curved surface. No flat faces.
- 2
- 6 faces. Three he can see, three hiding.
- Say it
- A curved surface helps it roll. Flat faces help it stand.
Lia's Maths Book · 2-D and 3-D Shape Names · liabooks.com/study4