##
**
Postulate 1:
**

A straight line may be drawn from any one point to any other point.

The postulate says that a line passes through two point.

But, it does not say that
**
only one line passes through 2 distinct points
**
.

So, we make an axiom of it - Axiom 5.1

##
**
**

Postulate 2:

Postulate 2:

Terminated line means line segment can be extended from either

side to form a lines.

Here, Line AB can be extended from both sides

##
**
Postulate 3:
**

A circle can be drawn with any center and any radius

Eg: Circle of radius 1.5 cm & centre (0, 0)

Circle of radius 2 cm & centre (0, 0)

Circle of radius 1 cm & centre (1, 1)

##
**
Postulate 4:
**

*
All right angles are equal to one another
*
.

Here, ∠ B = ∠ Q = 90°

##
**
Postulate 5:
**

*
If a straight line falling on two straight lines makes the interior
*

*
angles on the same side of it taken together less than two right angles, then the
*

*
two straight lines, if produced indefinitely, meet on that side on which the sum of
*

*
angles is less than two right
*
*
angles
*

We discuss more about it in Ex 5.2, 1