EchinaforceÂ® Echinacea drops (tincture) and tablets - herbal remedy for colds and flu. EchinaforceÂ® Echinacea is a licensed traditional herbal remedy for colds and flu. It helps the body fight the symptoms of these infections by supporting the immune system, helping to maintain the body's resistance.
User: Which parallelogram has four right angles and four congruent sides? A. square B. rectangle C. trapezoid D. rhombus Weegy: The true statement is: A square is a rhombus. kyler07|Points 151|.
A rectangle is a parallelogram with 4 right angles. Now, since a rectangle is a parallelogram, its opposite sides must be congruent and it must satisfy all other properties of parallelograms. In a rectangle, all angles are 90Â°. The diagonals of a rectangle are congruent. It's easy to prove that the diagonals of a rectangle with the Pythagorean theorem.