Please help me solve and explain

If the triangle shown in the diagram is dilated by a scale factor of
1/2 what will be the perimeter of the resulting triangle?
A) 6 units
B) 9 units
C) 12 units
D) 18 units

Please help me solve and explain If the triangle shown in the diagram is dilated by a scale factor of 12 what will be the perimeter of the resulting triangle A class=