Identify the geometric shapes and points labeled in the image.

Geometric Analysis:

• The image displays several geometric figures and labeled points on a grid background.
• There are three distinct diagrams, each featuring points labeled 'K', 'N', and 'a'. Some diagrams include line segments or lines.
• The first diagram shows a point labeled 'K' and another point labeled 'N', connected by a line segment. A label 'a' is near a line extending from the segment. Another label 'b)' appears above this diagram.
• The second diagram shows a point 'K' and a point 'N', with a line segment connecting them. A label 'a)' appears above this diagram.
• The third diagram shows a vertical line with a horizontal line intersecting it. Points labeled 'N' and 'a' are present. A label 'b)' is below this diagram.
• A fourth diagram shows a point 'N' and a point 'K' with a line segment between them, and a label 'a' nearby.