## Friday, August 13, 2010

### Question 1, 2, and 4 by Davina Ling

Question 1:
‘A square is a rhombus but a rhombus is not a square’.
Rhombus is a quadrilateral whose four sides all have the same length. The angles of a rhombus need not be a perfect angle.

Question 2:
Which of the given statements is correct? Justify your answer/s with examples.
A ) A square and a parallelogram are quadrilaterals.
B ) Opposite sides of a square and a parallelogram are parallel.
C ) A trapezoid has one pair of parallel sides.
D ) All the above

D.
A)Squares and parallelograms all have 4 sides.
B)All four sides are of equal length, and all four angles are right angles. An equivalent condition is that opposite sides are parallel. Rhombus is a quadrilateral whose four sides all have the same length.
C)The four-sided figure with one pair of parallel sides is referred to as trapezoid
I) As a/b/c are all correct so is D.

Question 4:
‘All parallelograms are squares?’ Do you agree with this statement?

No, I do not agree with this statement. The angles on a parallelogram does not necessarily need to be 90º. Unlike a square the angle have to be exactly 90º.

1. Entry #18
thabks Davina

2. Entry #19 actually

3. Q4.
What you have said is correct and clear.

4. ::: Q2 :::
Overall well explained, easy to understand but B) is kinda complicated because i cannot quite get how are angles related to parallel lines.

:::Q4:::
I think you can also add on to say that a square has to have four equal sides. Overall, well pointed out.

I hope my comment makes sense :D