Diagonals are congruent
Yes. All rectangles are also parallelograms, but not all parallelograms are rectangles.
All squares are parallelograms, but all parallelograms are not squares.
Parallelograms are squares is sometimes true. Squares are parallelograms is always true. Rhomboids are parallelograms is also always true. So not all parallelograms are squares but some are.
False! Squares are parallelograms. Parallelograms can be squares or rectangles or neither.
Yes because all parallelograms have four sides. But the opposite is not true. There are some quadrilaterals that aren't parallelograms.
Yes it's true.
Yes, thet's true. Rectangles are special kinds of parallelograms. So all rectangles are parallelograms, but there are other parallelograms that are not rectangles.
All rectangles are parallelograms.