Is 2,400 a reasonable estimate for 2,241

No, I do not think so.

A reasonable estimate would be 2,200 or even 2,240. It depends on how you round it.

2,000 is the result of rounding to the nearest thousands place.

2,200 is the result of rounding to the nearest hundreds place.

2,240 is the result of rounding to the nearest tens place.

∠lno ≅ ∠lnm

∠oln ≅ ∠mln

step-by-step explanation:

given   that triangle lno is congruent to triangle lnm.

we have to fill up the blanks in the given question.

according to above order of congruency   kept in mind we can say that

∠lno ≅ ∠lnm

∠oln ≅ ∠mln

ln ≅ ln due to common in both.

hence, by sas congruency,

the side angle side rule   states that if two sides and the included angle of one triangle are congruent to another triangle, then these two triangles are congruent.