Answer:
By hypotenuse - side test (HL) the two triangles are congruent.
Step-by-step explanation:
In ∆ABC and ∆DCB
i) angleABC = angleDCB.....(each 90°)
ii) BC = BC .....( common side)
iii) AC = DB.....(given)
 therefore by hypo-side test ∆ABC congruent ∆DCB
 
        
                    
             
        
        
        
9m+2=3m-10
subtract 3m from both sides to get:
6m+2=-10
subtract 2 from both sides to get:
6m=-12
finally, divide by 6 on both sides to get what m equals:
m=-2
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
We can use the point-slope form given by: 

Where <em>m</em> is the slope and (x₁, y₁) is a point. 
So, we will substitute -2 for <em>m</em> and (5, 2) for (x₁, y₁). This gives us: 

Simplify: 

Distribute: 

Add 2 to both sides. Hence, our equation is: 

 
        
             
        
        
        
Answer:
33.1
Step-by-step explanation:
First you need to find the area of the circle. The radius is 10 which means that the area is 314. Since a circle has 360 degrees, and the shaded area is 38 degrees, you need to divide 314 by 360 which is 0.87. Then multiply by 38 because the shaded sector is 38. 0.87 x 38 = 33.1. 
That is the answer. 
 
        
             
        
        
        
Answer:
45°
Step-by-step explanation:
Well, compared to 90°, it looks like it's just smaller, but not too small. It couldn't be 15° degrees, or 60°, as it was probably too much. I Don't think it's 30° either,  because it looked bigger than what a 30° angle would be.
Hope it helped!
~Flip