The document discusses different types of 2D and 3D shapes, their properties, and how they are defined. It explains that 2D shapes are flat figures defined by straight or curved lines, while 3D shapes have length, width, height and occupy space by enclosing a volume. Various examples of 2D shapes like triangles, squares and rectangles are provided, as well as 3D shapes like cubes which have faces, edges, vertices and volume that distinguish them from 2D shapes.

1. BY
ROHIT SAINI

2. WHAT ARE SHAPES
A shape is a geometrical figure tat can be described with
mathematics.
For example , two dimensional shapes like circle will fit
inside of a flat plane.
Three dimensional like cubes will not fit inside of a plane
, because they are not flat.

3. 2-DIMENSIONAL SHAPES
 These are 2D shapes or flat
plane . There sides are made
of straight or curved lines.
 They have fixed number of
lines. Plane figures are called
polygons .
 Triangles , squares and
rectangles are example of 2D
shapes.

4. PROPERTIES OF 2D SHAPES
 Two-dimensional shapes are planer . In case of a coordinate
system of more than two dimensions , then a 2D shape would
still depend on two coordinate directions.
 2D shapes include the square , the triangle , the rectangle etc.
 To understand it more easily you can say that 2D shapes do not
have prominrnt or rugged parts . For example , speaking 2D
you would have a square , whereas 3D shape have a cube.

5. THREE DIMENTIONAL
SHAPES
A 3D shape is a solid
which encloses a volume ,
and has length breadth and
height

6. PROPERTIES OF 3D SHAPES
Three-dimensional have four properties that apart from
two-dimensional shapes : face , vertices , edges and
volume . These property not only allow you to determine
whether the shape is two-dimensional or three-
dimensional , but also which three-dimensional shape it is
.

7. FACES OF A CUBE
A part of shape that is flat
or curved.
A cube has six faces.

8. Edges of a cube
Line where two faces
meet.
A cube has 12 edges.

9. Vertices of a cube
 A place where two faces
meet.
A cube has 12 vertices

10. Difference between 2D and 3D
shapes
2D shapes 3D SHAPES
 2D is flat using the X and Y
(horizontal and vertical) axis the
image have only two dimension
and if turned to the side becomes
a line
 3D add Z dimensions.
 The third dimensions allows for
rotation and depth.
 It’s essential the difference
between a painting and
sculpture.

11. Nets for building 3D shapes
In order to understand three dimensional shapes objects
more closely , we try to form these objects from their nets.
A net for a three dimensional shape is nothing but a sort of
skelton - outline in 2-dimension which , when folded ,
results in three dimensional shape.

12. Different types of nets for 3D
shapes

13. Different types of nets for 3D
shapes

14. Different types of nets for 3D
shapes

15. YOU