Question

△FEB≅△CNB.

What is length of BN¯¯¯¯¯¯ ?

Answer 1

3.8
You simply match them up in corresponding order and use CPCTC

Answer 2

we know that

The CPCTC states that corresponding parts of congruent triangles are congruent

so

△FEB≅△CNB

that means

`FE=CN\\FB=CB\\EB=NB`

we have

`FE=6.1\ units\\FB=4.8\ units\\EB=3.8\ units`

therefore

`BN=3.8\ units`

the answer is

the length of BN is
`3.8\ units`