Answer:
Hi:) Do you have a specific question on something or just some tips for those desired good grades?
Step-by-step explanation:
 
        
                    
             
        
        
        
X<<span>y+<span>3 its simple here is your answer</span></span>
        
             
        
        
        
3. ΔPQR ≅ ΔSRT
3. ASA  (Angle - Side - Angle) - we have two triangles where we know two angles and the included side are equal
If two sides and the included angle of one triangle are equal to the corresponding sides and angle of another triangle, the triangles are congruent. 
4. PR ≅ SR
4. ΔPQR ≅ ΔSRT - the corresponding sides are congruent.
 
        
             
        
        
        
V = 4/3 * pi * r^3
V = 4/3 * 3.14 * 21^3
Simplify exponent:
V = 4/3 * 3.14 * 9261
Multiply:
V = 38772.72
        
                    
             
        
        
        
Answer:
104 degrees
Step-by-step explanation:
First let's start by finding Angle DGC. Since Angle FGD and DGC are a linear pair, Angle DGC = 180-90 = 90 degrees.
Next we need to find GDC
Angles in a triangle add up to 180 degrees therefore...
Angle GDC + DCG + DGC = 180
Plug in the values we found into the equation
Angle GDC + 37 + 90 = 180
Angle GDC + 127 = 180
Angle GDC = 53
Therefore Angle ADC = 53 + 51 = 104 degrees
Since ABCD is a parallelogram, then opposite angles are equal therefore...
Angle B = 104 degrees