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Can a quadrilateral be a parallelogram and a rhombus?
Yes. All rhombuses are parallelograms, but the reverse is not true. (I.e. there are parallelograms which are rhombuses and there a parallelograms that are not rhombuses. -- Just like Every bus has wheels but not everything with wheels is a bus.)
Do parallelograms have parallel sides?
Yes. A Parallelogram is a quadrilateral that has two pairs of parallel sides which are opposite each other and of equal length, though the pairs may be of different length to each other. If the angles are all 90° then the parallelogram is also a rectangle. If the angles are all 90° AND all sides are equal then the parallelogram is also a square. All squares are rectangles, but not all rectangles are squares; Similarly all squares are rhombuses but not all rhombuses are squares And all rhombuses, and thus squares, are parallelograms, but not all parallelograms are rhombuses (nor squares).
Why all rhombuses is a parallelogram?
Because they share same properties of a parallelogram although a rhombus has 4 equal sides and diagonals that intersect each other at right angles.
Are rhombuses special parallelogram?
Yes. A parallelogram has two pairs of equal sides, but in a rhombus all the sides are equal.(similar situation: a square is a special kind of rectangle)
Names of 4 sided shapes?
a vague answer would be polygon, parallelogram, and quadrilateral. there are also squares, rectangles, rhombuses, and trapezoids.
