I don’t know because I think you copied the question wrong
        
                    
             
        
        
        
Answer:
D
Step-by-step explanation:
none of the others make sense
 
        
             
        
        
        
The true statement is Line MK is the perpendicular bisector of LN and ML is ≅  MN. 
<h3>What is perpendicular?</h3>
Perpendicular lines are lines that intersect at a right (90 degrees) angle.
Given:
Δ LMN and Δ LKN are connected at side LN.
As per the information,
Line MK is the perpendicular bisector of LN. and ML ≅  MN. 
Learn  ore about this concept here:
brainly.com/question/25397944
#SPJ1
 
        
             
        
        
        
Height would be 21 inches, depth would be 5.