Answer:
314
Step-by-step explanation:
First, find the diameter which is 10 and square it. Then, multiply by pi or 3.14 to get 314. 
(IF THIS HELPED PLEASE GIVE BRAINLIEST!)
 
        
             
        
        
        
Answer:
a) Angle X = 108° 
<h3>C). Vertically opposite angles</h3>
as AD is parallel to EH both the angles are equal 
 
        
                    
             
        
        
        
Answer:
20
Step-by-step explanation:
it is the same length as DC just going diagonal.
(i am not good at explaining in case you could not tell)
 
        
             
        
        
        
Step-by-step explanation:
1) x/20 = -9
By cross multiplication,
x = -180
2) -168 = -14k
k = -168/-14
k = 12
3) -5m = -50
m = 10
4) -320 = -20n
n = 16
5) -4 = x - 5
x = 1
6) -6(-8 + n) = -54
42 - 6n = -54
-6n = -54 -52
6n = 106
n = 17.6
7) 3(x - 9) = -3
3x - 27 = -3
3x = 24
x = 8
8) 9k + 3 = -78
9k = -81
k = -9
9)4 + (n/4) = 8
By taking LCM,
16 + n/4 = 8
16 + n = 32
n = 16
10) -5r + 7 = -73
-5r = -80
r = 16
<em>Hope</em><em> </em><em>it</em><em> </em><em>helps</em><em>.</em>