a photo has a perimeter of 20 cm. using a photocopier you enlarge the photo so that its new perimeter is 70cm. what is the scale factor dilation.
a:12.3
b:7.5
c:3.5
d:0.3
help?
so 3.5?
70:20 = 7/2 = ____
What is 70/20 ?
To find the scale factor dilation, we need to find the ratio of the new perimeter to the original perimeter.
Original perimeter = 20 cm
New perimeter = 70 cm
Scale factor dilation = New perimeter / Original perimeter
Scale factor dilation = 70 cm / 20 cm
Simplifying the ratio, we get:
Scale factor dilation = 3.5
Therefore, the correct answer is c) 3.5.