To delete a node on a segment:
1. Click on the "Edit path by nodes"
tool button.

2. Then click on the object to select the nodes.

3. Click on the node you wish to delete in order to select it. Note that the selected node is highlighted.
4. Click on the "Delete selected nodes"
button on the tool bar to delete the selected node.

The remaining nodes adjacent to the one you deleted will now be connected with a Bezier curve.

5. With the "Edit path by nodes" tool selected, drag the segment shaping handles to adjust the shape of the segment between the two remaining adjacent nodes.
More Graphics Design Tips:
• XDdom 3D Axis and Coordinate System
• How to Use Basic Linear Gradients in Inkscape
• How to Remove PNG and JPEG EXIF Metadata
• How to Trace an Image Using Inkscape
• Animation Software - The Amazing 3D World
• Inkscape Grouping
• Export Inkscape Drawing as an Image
• Image Scanning - Confused About DPI?
• Building an Image with a Logo
• How to Create Radial Gradients in Inkscape
