Q1. A rhombus has 4 equal sides, 2 sets of parallel lines, opposite equal acute angles, opposite equal obtuse angles. A square has 4 equal sides, 2 sets of parallel lines and 4 right angles, which are considered as both acute and obtuse angles as they are all 90 degrees. However, not all acute angles are 90 degrees and not all obtuse angles are 90 degrees, as a result, all square are rhombuses but not all rhombuses are square.
Q4. No, all parallelogram is not a square because all of the sides of a square have the same length. At the same time, some parallelograms are rectangles which means not all parallelograms are squares.
Q5. BFED is a parallelogram because it has four sides which are parallel to the line on its opposite side and the angles add up to 1800
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