Question

The blue triangle has been dilated from the red triangle, What was the scale factor (k)? A. 3B. 4C. 1/3D. None of the aboveI would appreciate the help on this problem.

Answer 1

the scale factor is 3

to find the scale factor we measure one side of the red triangle; in this case, AB is 2

then we measure the dilated side A'B' and we obtain 6

so, we have to find a number that if we multiply by 2, we obtain 6

$\begin{gathered} 2\cdot x=6 \\ x=\frac{6}{2} \\ x=3 \end{gathered}$