Question

Please help quick
If these triangles are similar, what is the length of side DF?

Answer 1

✿  $\mathsf{Scale\;Factor = \frac{1.5}{2.5} = \frac{15}{25} = \frac{3}{5}}$

$\mathsf{\implies Length\;of\;DF = \frac{3}{5} \times AC}$

$\mathsf{\implies Length\;of\;DF = \frac{3}{5} \times 4}$

$\mathsf{\implies Length\;of\;DF = (0.6)(4)}$

$\mathsf{\implies Length\;of\;DF = 2.4\;u}$