Questions 1, 4 and 5 by Yuzhe

Question 1

A square is a rhombus as the definition of a square is that it has four equal sides and since the rhombus has four equal sides, it is like a rhombus. A rhombus is not a square as the rhombus sides does not have a right angle triangle but a square has.

Question 4

No, because most parallelogram does not have equivalent sides thus not all parallelogram are squares.

Question 5

Since E and F are the midpoints of the parallelogram ABCD so if E and F is joined with any of the two sides it will be a parallelogram

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