I have a 7 sided shape that looks like an octagon, but it only has 7 sides. Is it a rhombus, a square, a parallelogram, a kite, a rectangle, a trapezoid, a chevron, or just a quadrilateral?
A 7 sided figure cannot look like an octagon, an octagon has 8 sides!
If it is a solid, not plane figure, it is a Heptahedron.
http://mathworld.wolfram.com/Heptahedron.html
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Based on the given information, we can determine the shape is a heptagon, which is a polygon with seven sides. None of the options you mentioned (rhombus, square, parallelogram, kite, rectangle, trapezoid, chevron) can directly describe a polygon with seven sides. Therefore, we can conclude that the shape you have described is simply a heptagon, which is a specific type of polygon.
