Question

what is the length of AC??​

Answer 1

The two triangles are similar and therefore we can write-

$\frac{AB}{DE} = \frac{AC}{DF}$

$\frac{4.8cm}{2.4cm} = \frac{AC}{1.3cm}$

$AC = 2 \times 1.3cm$

$\: \: \: \: \: \: \: \: \:= 2.6cm$