## Friday, August 13, 2010

### Question 1,2,4 by Gregory Chew

1. The statement is justified as a rhombus can be a square since a square has two pair of parallel line and all the lines are of equal length, but a rhombus is not a square since a square must have right angles but a rhombus does not.
2. Statement D is correct.  Statement A is correct because both squares and parallelograms have four sides and a quadrilaterals has four sides.  Statement B is correct because a square is a parallelogram.  Since they both share the same properties that lines of the opposite sides are parallel, this statement is correct as well.   Statement C is correct because a trapezoid has one pair of parallel lines.  Since all 3 statements are correct, statement D is correct.
4. I do not agree with this statement as a parallelogram does not have to have for sides of equal lengths but a square has.  Also, a parallelogram may may not have all angles to be 90 degrees but in a square, all the angles are right angles.