1. Divide the new dimension by the original dimension:
2/8 = 1/4
3/12 = 1/4
6/24 = 1/4
The scale factor was 1/4 scale
2. Same steps as number 1.
12/3 = 4
16/4 = 4
20/5= 4
The scale factor was 4
A triangle is only possible if you can add any two sides and have the sum be larger than the third side. This happens with choice B, C, and D.
With choice A, we have 11+14 = 25 not larger than the third side of 25. So a straight line is possible and it's not possible to draw a triangle with these dimensions.
Answer: Choice A
note: This is using the triangle inequality theorem
Think about c/3 =4/1 and apply the cross multiplication rule since those two fractions are equal.
We get c•1= 3•4
c=12