Since a square is a parallelogram, a rectangle, and a rhombus, our symmetry observations for a square will be the same as those we have already seen. A trapezoid has no reflectional symmetry and no rotational symmetry. We cannot make observations.
1 Bring to a boil then simmer, about an hour or until meat tender.  Add potatoes, carrots and green olives; simmer for another 6 to 8 minutes. Season salt and pepper to taste. Add bell peppers, cook for additional 2 minutes.
SautÃ© the onion and green pepper in the olive oil until tender. Add the garlic, and sautÃ© another minute or two. Add the tomato paste, black beans, oregano, cumin, bay leaf, and vinegar. Cook for about five minutes, stirring gently. Add the chicken stock and the rinsed rice. Bring to a boil, reduce heat to low, cover and cook for about 20-30 minutes -- until the rice is fully cooked.