The rectangle below is dilated by a scale factor of one half
2
1
. Find the perimeter of the dilated rectangle. Figures are not necessarily drawn to scale.
20 18
The original rectangle has a perimeter of 2(20) + 2(18) = 76.
After dilating the rectangle by a scale factor of 1/2, the dimensions become 10 and 9.
So, the perimeter of the dilated rectangle is 2(10) + 2(9) = 38.