Step-by-step explanation:
<u>Given </u><u>:</u><u>-</u><u> </u>
A semicircle is given with radius of 3cm .
And we need to find the perimeter of the semicircle . We know the perimeter as , 
 Perimeter = πr
 Perimeter = πr 
 Perimeter = 3cm × π
 Perimeter = 3cm × π 
 Perimeter = 3π cm .
 Perimeter = 3π cm .
Now there is the diameter of circle is 6cm . Hence totally the perimeter is , 
 Perimeter = 3π + 6 cm
 Perimeter = 3π + 6 cm
We were supposed to give answers in terms of π . 
<h3>Hence the perimeter is ( 3π + 6 ) cm</h3>
 
        
             
        
        
        
Yh I think the missing number will be 6 because they are equivalent to 1:2
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
H = V/ pie r^2
H = 
R= 5 because the radius is half the diameter
Pies cancel out leaving you with:
H = 2200/5^2
H = 2200/25
H = 88
Hope this helps :)