Chap 10
VISUALISING SOLID SHAPES
SOME IMPORTANT FACTS
1.
Plane shapes have two measurements like length and
breadth, so they are called 2-d shapes.
2. Solid
objects have three measurements like
length breadth and height, so they are called 3-d shapes. 3- d shapes have different views from different angles.
3. A map
depicts the location of a particular object/ place . It involve a scale which
is fixed for a particular map
4. Different
symbols are used to depict different objects/ places.
5. A
polyhedron is a solid that is bounded by polygons. Which are called its faces,
these faces meet at edges which are line segments; and the edges meet at
vertices which are points.
6.
Euler’s
formula.
For any
polyhedron, f + v
- e = 2, where ‘f’ stands for number of faces , v stands for number of vertices and e stands for number of edges. This relationship is Euler’s formula.
