Given:
Length of the circular arc with circle radius=49cm
θ=135°
Now, 
Length of arc = θ/360°×2πr
49=2× 22/7×r×135°/360°
49×20×7/3×22×2
51.96cm
 
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Already, we are given 12% of our sample size as 24.
To find the sample size, we equate to find 100%.
Let sample size be denoted by 

Hence, the sample has 200 families.
 
        
             
        
        
        
Answer:
XY is a tangent
Step-by-step explanation:
Given



Required
Is XY a tangent?
XY is a tangent if:

Because XY should make a right angle at point X with the circle
Where

So, we have:




This gives:



<em>Yes, XY is a tangent</em>
 
        
             
        
        
        
The second one 
Hope this helps :D
        
                    
             
        
        
        
Answer:
13
Step-by-step explanation:
cos(60) =building height / 26