A kite or arrowhead.
You divide the length of one adjacent side by the length of the other adjacent side.
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The diagonals of rectangles are rotational lines of symmetry but not reflective. To be reflective lines, folding along the line has to give the same shape on each side.
Knowing the length of the hypotenuse doesn't tell you the length of either adjacent side. You also need to know at least one other piece of information, like the other side, or an angle.
There are very many attributes. Some of these are:It is a two-dimensional shape. It has four sides. The sides are of equal length. It has two pairs of parallel sides. It has four vertices. Each vertex is a right angle. It has two diagonals. The diagonals bisect each other. The diagonals meet at right angles. It has rotational symmetry of order four. It has four axes of reflective symmetry. If the sides are of rational length then the diagonals are of irrational length (and conversely).
A kite or arrowhead.
A kite or arrowhead.
That is a parallelogram.
Both shapes have 4 sides, two pairs equal in length. In a parallelogram the equal length sides are opposite each other. In a kite the equal length sides are adjacent.
A kite, a square or a rhombus
It can be a square or a rhombus
Yes, a regular hexagon has ALL sides the same length and ALL angles equal. If you flatten it somewhat (like the profile of a lens) then the sides may still have the same length but some angles will be larger than others if opposite angles are the same than there will be symmetry. (there are many other options to retain symmetry in a hexagon this is but one)