Answer:
10
Step-by-step explanation:
thats correct i think
 
        
             
        
        
        
Answer:
a^2 + b^2 = c^2
Step-by-step explanation:
a^2 + b^2 = c^2
 
        
             
        
        
        
I’m not sure what that is
        
             
        
        
        
Answer:
B.  Sine.
Step-by-step explanation:
We need to find the value of x which is opposite to the given angle  (50 degree).  Also we are given the length of the hypotenuse.
Sine = opposite / hypotenuse so we would use the sine.
Its worth committing this mnemonic to memory, which helps to find the required trig ratio:
SOH-CAH-TOA.
SineOpposite/Hypotenuse- CosineAdjacent/Hypotenuse-TangentOpposite/Adjacent.