Slide on understanding shapes

1. Math's Project Work
Maths is not about numbers ,
equations , algorithms ; its about
understanding…………………

2. Visualizing
solid shaPes

3. Contents
2-dimensional shapes and their
properties
3-dimensional shapes and their
properties
Maps
What do colors represent on map
Different views of 3-d & isometric
shapes
Quiz...

4. 2-Dimensional Shapes
Two-dimensional shapes have no
thickness, but they do have two
measures of distance associated with
them, such as width and height. They
can be drawn on a flat surface.

5. 2-Dimensional Shapes
The dimensions of a two-dimensional
shape are used to derive or calculate
the object's area. Because two-
dimensional shapes have no thickness
or depth, there is no notion of volume
associated with them.

6. 2-Dimensional Shapes
Some examples of two-dimensional
shapes are rectangles, circles,
triangles, hexagons, trapezoids and
quadrilaterals

7. Properties of 2d shapes
 These shapes are flat and can only be
drawn on paper.
 They have two dimensions – length and
width.
 They are sometimes called plane shapes.
One of the lines that make a flat (2-
dimensional) shape.
 The amount of turn between two straight
lines that have a common end point (the
vertex).

8. 3-Dimensional Shapes
 Single-dimensional shapes exist
only in one dimension, which
means that they only possess
length.
 Two-dimensional shapes have two
dimensions, including length and
width. These shapes are always
flat.

9. 3-Dimensional Shapes
 By adding an additional dimension
to 2-D shapes, many 3-D shapes can
be constructed, such as cubes,
pyramids and spheres.
 The mathematical term for a solid
3-D shape is "polyhedron."

10. Properties of 3d shapes
 These shapes are solid or hollow.
 They have three dimensions – length, width
and height.
 Faces-Part of a shape that is flat.(Or
curved)
 Edge-The line where two faces meet.
 vertex-The place where three or more edges
meet.
 Parallel - These type of lines stay the same
distance apart for their whole length. They
do not need to be straight or the same
length.

11. Map
 A map is a graphical representation of
a portion of earth’s surface drawn to
scale as seen from above.
 It uses color ,symbols, scale and
labels to represent features found
on ground.
 The job of a map is to describe spatial
relationships of specific features
that the map aims to represent.
 There are many different types of
maps that attempt to represent
specific things

12. What do colors represents on a map ?
 Blue – water (streams, lakes, permanent snow
fields and glaciers, etc.)
 Green – forest and vegetation
 White – a general lack of vegetation
 Brown – contour lines (elevation information)
 Black – man-made/cultural features (buildings,
place names, boundary lines, roads, etc.)
 Red – Highways and major roads,
Township/Range/Section information
 Pink – urban areas
 Purple – reflect revisions to a map but is no
longer used on maps in production

13. Views of 3-D shapes
Side view

14. Views of 3-D shapes
Top view

15. Views of 3-D shapes
Front view

16. Different views of a Isometric shape

18. 1. a 3d shape is ______.
. solid
. flat
. small
. none of these

19. 2. a 2d shape is ________.
. solid
. flat
. small
.none of these

20. 3. 2d shapes can be drawn on
________.
wood
Glass
Metal
paper

21. 4. Map is a __________.
pictorial representation
MatheMatical probleM
Graphical representation
scientific terM

22. 5. what black represents on a
Map?
river
canals
 hiGhways
Man Made features

23. 6. what red represents on a
Map?
river
canals
 hiGhways
Man Made features

24. 7. What blue represents on a
map?
streams
roaDs
 highWays
man maDe features

25. 8. What pink represents on a
map?
river
Canals
urban areas
man maDe features

26. maDe by-
name-anjali
Class-viii-’a’
roll.no-8102