A rhombus has unequal diagonals which intersect at right-angles.
A rectangle has 2 pairs of parallel sides and its diagonals are of equal length but do not cross each other at 90 degrees
A kite
depending if its octagon regular, or irregular (sides arent equal angles arent equal
A parallelogram
A parallelogram (or rectangle) which is not a rhombus (or square).
When two perpendicular lines cross you get four equal angles of 90 degrees.
A rectangle would fit the given description
No. A cross product is just a way of simplifying a proportion. If the cross product aren't equal, it follows logically that the proportion isn't equal.
0 degrees C is equal to 32 degrees F
No, -129 degrees Fahrenheit is equal to -89.44 degrees Celsius.
47 degrees Celsius is equal to a temperature of 116.6 degrees Fahrenheit.
14 degrees Celsius is equal to 57.2 degrees Fahrenheit.