A closed corner is when a shape or item isolates the corner of an image.
When a symmetrical shape is cut off, by the border of the page or a larger shape, it will create an uncomfortable feeling.
When an item comes too close, or fuses with, the edge of the border.
When two items comes very close to each other,
or just barely fuse together.
Similar to a tension point or fused edge, but shares a whole edge.
One item steals the edge or contour of another.
An edge of an item is hidden by another.
When multiple items, especially symmetrical ones, share the same axis.
When the placement of one item near another causes you to associate them too closely.
When one item seems to be pointing to another, drawing attention to it or away from something else.
Reinforced by objects normally expected to be pointed at things or have targets- pointing fingers, guns and other weapons, spotlights, direction eyes are looking
If you're looking to fix your tangents, you could:
Make your own HTML slideshow: