Please do 3.1, 3.5, 3.6...

Dear Student,
3.1) As clearly mentioned by the procedure, the triangle formed will be an equilateral triangle.Also, as all three angles of an equilateral triangle are equal and is 60o

3.5) If Side of square is halved.
Let Original side be 'a' unit and thus, original area = Side2​ = a2
New Side = 0.5a
Thus, ​​​New area = Side2​ = (0.5a)2 = 0.25a2
Hence Area will decrease as  0.25a2 < a

3.6) Side of Square id doubled.
Let Original side be 'a' unit and thus, original area = Side2​ = a2
New Side = 2a
Thus, ​​​New area = Side2​ = (2a)2 = 4a2
Hence Area will be quadrupled.

Regards

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