Question

line l bisects the segment. find the length of ab.

Explanation:

Step1: Recall the property of a bisector

A line that bisects a line - segment divides it into two equal parts.

Step2: Identify the equal - length segments

Since line $l$ bisects segment $AB$, if one part of the bisected segment is $2.9$, then the other part is also $2.9$.

Step3: Calculate the length of $AB$

$AB$ is the sum of the two equal - length parts. So $AB=2.9 + 2.9$.
$AB = 5.8$

Answer:

$5.8$