__(D) All of the above.__

-(a) Quadrilaterals refer to figures with four sides. Both a square and a parallelogram have four sides, thus both are quadrilaterals.

-(b) There are lines in a square and a parallelogram that are side by side and having the same distance continuously between them, thus they are parallel.

-(c) A trapezoid has two line parallel to each other, which is the bottom line and the top line.

•Q4.

__No, I do not agree with this statement.__

A parallelogram is a figure with 2 pairs of parallel lines.

In a rhombus/rectangle, this rule applies too as in both figures, there are 2 pairs of parallel lines.

This the statement is wrong.

•Q5.

BF and ED are both halves of BC and AD respectively. Since BC and AD are equal in length, BF and ED are equal as E and F is the midpoint of BC and AD. When BF and ED are equal, BE and FD must also be equal since both are parallel to each other.

:D

Question 2,4,5. Done by Clarabelle.

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