Visualising Solid Shapes Class 8 PPT

 Page 1


CONTENTS…
• WHAT ARE SHAPES?
• 2-DIMENSIONAL SHAPES
• PROPERTIES OF 2-DIMENSIONAL SHAPES
• 3-DIMENSIONAL SHAPES
• PROPERTIES OF 3-DIMENSIONAL SHAPES
• DIFFERENCE BETWEEN 2-DIMENSIONAL AND 
3-DIMENSIONAL SHAPES
• FACE’S
• EDGE’S
• VERTICES
• POLYEDRONS , PRISM AND PYRAMIDS
Page 2


CONTENTS…
• WHAT ARE SHAPES?
• 2-DIMENSIONAL SHAPES
• PROPERTIES OF 2-DIMENSIONAL SHAPES
• 3-DIMENSIONAL SHAPES
• PROPERTIES OF 3-DIMENSIONAL SHAPES
• DIFFERENCE BETWEEN 2-DIMENSIONAL AND 
3-DIMENSIONAL SHAPES
• FACE’S
• EDGE’S
• VERTICES
• POLYEDRONS , PRISM AND PYRAMIDS
WHAT ARE SHAPES?
• A shape is a geometrical figure that 
can be described with mathematics.
• For example, two-dimensional shapes 
like circles will fit inside of a 
flat plane.
• Three-dimensional objects like cubes 
will not fit inside of a plane, because 
they are not flat.
Page 3


CONTENTS…
• WHAT ARE SHAPES?
• 2-DIMENSIONAL SHAPES
• PROPERTIES OF 2-DIMENSIONAL SHAPES
• 3-DIMENSIONAL SHAPES
• PROPERTIES OF 3-DIMENSIONAL SHAPES
• DIFFERENCE BETWEEN 2-DIMENSIONAL AND 
3-DIMENSIONAL SHAPES
• FACE’S
• EDGE’S
• VERTICES
• POLYEDRONS , PRISM AND PYRAMIDS
WHAT ARE SHAPES?
• A shape is a geometrical figure that 
can be described with mathematics.
• For example, two-dimensional shapes 
like circles will fit inside of a 
flat plane.
• Three-dimensional objects like cubes 
will not fit inside of a plane, because 
they are not flat.
2-DIMENSIONAL SHAPES
• These are two-
dimensional shapes
or flat
plane geometry
shapes. Their
sides are made of
straight or curved
lines. They can have
any number of sides.
Plane figures made
of lines are called
polygons. Triangles
and squares are
examples of
Page 4


CONTENTS…
• WHAT ARE SHAPES?
• 2-DIMENSIONAL SHAPES
• PROPERTIES OF 2-DIMENSIONAL SHAPES
• 3-DIMENSIONAL SHAPES
• PROPERTIES OF 3-DIMENSIONAL SHAPES
• DIFFERENCE BETWEEN 2-DIMENSIONAL AND 
3-DIMENSIONAL SHAPES
• FACE’S
• EDGE’S
• VERTICES
• POLYEDRONS , PRISM AND PYRAMIDS
WHAT ARE SHAPES?
• A shape is a geometrical figure that 
can be described with mathematics.
• For example, two-dimensional shapes 
like circles will fit inside of a 
flat plane.
• Three-dimensional objects like cubes 
will not fit inside of a plane, because 
they are not flat.
2-DIMENSIONAL SHAPES
• These are two-
dimensional shapes
or flat
plane geometry
shapes. Their
sides are made of
straight or curved
lines. They can have
any number of sides.
Plane figures made
of lines are called
polygons. Triangles
and squares are
examples of
PROPERTIES OF 2-
DIMENSIONAL SHAPES
• Two-dimensional shapes are planar. In the case of a
coordinate system of more than two dimensions, then
a 2-D shape would still depend on two coordinate
directions. For example, in a spatial xyz coordinate
system (which is three-dimensional) a two-dimensional
shape would be expressed with points such as (x,y,0),
(x,0,z), or (0,y,z). Therefore, it would depend on
either x and y, x and z, or y and z.
• 2-D shapes include the square, the triangle, the
rhombus, etc.
• To understand it more easily, you can say that 2-D
shapes do not have prominent or rugged parts. For
example, speaking two-dimensionally you would have a
square, whereas three-dimensionally you would have a
cube, which is like an extended or prominent square.
Page 5


CONTENTS…
• WHAT ARE SHAPES?
• 2-DIMENSIONAL SHAPES
• PROPERTIES OF 2-DIMENSIONAL SHAPES
• 3-DIMENSIONAL SHAPES
• PROPERTIES OF 3-DIMENSIONAL SHAPES
• DIFFERENCE BETWEEN 2-DIMENSIONAL AND 
3-DIMENSIONAL SHAPES
• FACE’S
• EDGE’S
• VERTICES
• POLYEDRONS , PRISM AND PYRAMIDS
WHAT ARE SHAPES?
• A shape is a geometrical figure that 
can be described with mathematics.
• For example, two-dimensional shapes 
like circles will fit inside of a 
flat plane.
• Three-dimensional objects like cubes 
will not fit inside of a plane, because 
they are not flat.
2-DIMENSIONAL SHAPES
• These are two-
dimensional shapes
or flat
plane geometry
shapes. Their
sides are made of
straight or curved
lines. They can have
any number of sides.
Plane figures made
of lines are called
polygons. Triangles
and squares are
examples of
PROPERTIES OF 2-
DIMENSIONAL SHAPES
• Two-dimensional shapes are planar. In the case of a
coordinate system of more than two dimensions, then
a 2-D shape would still depend on two coordinate
directions. For example, in a spatial xyz coordinate
system (which is three-dimensional) a two-dimensional
shape would be expressed with points such as (x,y,0),
(x,0,z), or (0,y,z). Therefore, it would depend on
either x and y, x and z, or y and z.
• 2-D shapes include the square, the triangle, the
rhombus, etc.
• To understand it more easily, you can say that 2-D
shapes do not have prominent or rugged parts. For
example, speaking two-dimensionally you would have a
square, whereas three-dimensionally you would have a
cube, which is like an extended or prominent square.
3-DIMENSIONAL SHAPES
• A 3D shape is a solid which encloses a 
volume and has length, breadth and 
height.