A (n) Shaded background Appears behind selected text  so option. 4) Is  correct. 
What is shading background?
Shading background is process, When  selecting a particular  text there behind the text a shad will form which shows the number of texts selected 
Thus,  shaded background appears behind selected text
Learn more about related Commands here:
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1 dog and 2 cats..................................
        
             
        
        
        
Answer:
a) x represents length?
b) 10+x=48
d) 38 inches
Step-by-step explanation:
c) 10+x=48
subtract 10 to both sides
x=48-10
x=38
 
        
             
        
        
        
Answer:
the capital of france is paris.
 
        
                    
             
        
        
        
Symmetric property of congruence.
Solution:
Given statement:
If ∠1 ≅ ∠2, then ∠2 ≅ ∠1.
<em>To identify the property used in the above statement:</em>
Let us first know some property of congruence:
Reflexive property:
The geometric figure is congruent to itself. 
That is  .
.
Symmetric property of congruence:
If the geometric figure A is congruent to figure B, then figure B is also congruent to figure A.
That is  .
.
Transitive property of congruence:
If figure A is congruent to figure B and figure B is congruent to figure C, then figure A is congruent to figure C.
That is 
From the above properties, it is clear that,
If ∠1 ≅ ∠2 then ∠2 ≅ ∠1 is symmetric property of congruence.