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Draw a rough diagram of two angles such that they have:
I). One common point
II). Two common points
III). three common points
IV). Four common points

Answer
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Hint: In geometry, an angle is formed by two rays meeting at a common endpoint. An angle is represented by the symbol . Angles are measured in degrees, using a protector.
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In the above figure,
The angle is ABC.
The angle has two rays BA and BC.
These two rays BA and BC start with a common point B.
Hence, the angle has one common point B.

Complete step-by-step solution:
I). Two angles have one common point:
If two angles have one common point then, their endpoint is the same.
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In the above figure, there are two angles.
The first angle is ABD and the second angle is DBC.
In these two angles, there is only one common point ‘B’.
II). Two angles have two common points:
Since the angle has only one endpoint, we cannot have two angles with two points in common.
It is not possible.
III). Two angles have three common points:
Since the angle has only one endpoint, we cannot have two angles with three points in common.
It is not possible.
IV). Two angles have four common points:
Since the angle has only one endpoint, we cannot have two angles with four points in common.
It is not possible.

Note: Remember that two or more angles have only one endpoint. So, we can say that two or more angles have only one common point.
Parts of an Angle:
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Arms: The two rays joining to form an angle are called arms of an angle. Here, OA and OB are the arms of the ABC.
Vertex: The common end point at which the two rays meet to form an angle is called the vertex. Here, the point O is the vertex of ABC.
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