6. a parallelogram is dilated by a scale factor of three. which of the following properties are unchanged? i. the perimeter and area ii. the measure of the angles iii. the lengths of the sides i, ii, and iii ii and iii ii iii

The perimeter would be tripled, and the area would be multiplied by 3^2, which is 9, so option (i) is incorrect.
The angles would be unchanged, so option (ii) is correct
The lengths of the sides would be multiplied by 3, so option (iii) is incorrect

Only correct response is option (ii)