A diagonal.
fractions
A line of symmetry cuts the shape in half or into sections evenly so if you were to fold against the line it would be even on either side
A diagonal in a shape is a straight line from one vertex to another vertex (corner).
"Diagonal" is not a shape, it is a direction, or orientation. If you drew a line from one corner of a square to the opposite corner, that new line would be diagonal to the square. Here is an example: / or \
An oblique line (line that slants) from one part of the shape to the other e.g from one corner of a square to the opposite corner is a diagonal line. I hope this solved your problem
"Diagonal" is not a shape, it is a direction, or orientation. If you drew a line from one corner of a square to the opposite corner, that new line would be diagonal to the square. Here is an example: / or \
Many 3d shapes have a corner.
A line that cuts a segment in half is a bisector
A shape with one corner is a triangle. Yes, I know, technically it has three sides, but it only has one corner. So, there you have it, a triangle is the shape you're looking for.
To help someone quickly see the post. The posts itself is used to determine where the ball exited the field, across the goal line or touch line.
Wich 3 D shape has a corner on it?
triangle