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?
3 answers
70:20 = 7/2 = ____
What is 70/20 ?
so 3.5?
1 answer