Name a quadrilateral that has at least one pair of parallel sides

Aquadrilateral has exactly 3 congruent sides davis claims that the figure must be a rectangle why is his claim incorrect.

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale

Atransformation was performed on rectangle c as shown in the graph. what type of transformation was performed? does that transformation result in congruent shapes? you people