Question

what is x the missing side length in triangle DEF

Answer 1

Answer:

x = 9.75

Step-by-step explanation:

We know that Triangle ABC and DEF are congruent, therefore;

$\frac{CB}{FE} = \frac{AB}{DE}$

$\frac{12}{9 }=\frac{13}{x}$

=> 12*x = 9*13

=> 12x = 117

=> x = 117 / 12

=> x = 9.75

Hope this helps!