We have that AB || DC. 
By a similar argument used to prove that AEB ≅ CED,we can show that (AED) ≅ CEB by (SAS) . So, ∠CAD ≅ ∠ (ACB) by CPCTC. Therefore, AD || BC by the converse of the ( 
ALTERNATE INTERIOR ANGLES) theorem. Since both pair of opposite sides are parallel, quadrilateral ABCD is a parallelogram
1. AED 
2. SAS 
3. ACB 
4. ALTERNATE INTERIOR ANGLES
        
                    
             
        
        
        
Answer:
B = 62.9ft
Step-by-step explanation:
The distance where she is from the oak tree is 75ft,
The angle of elevation the stone makes with the top of the oak tree is 40°
The height of the tree is x ft
See attached document for better illustration 
Using SOHCAHTOA, 
Tanθ = opposite/ adjacent 
θ = 40°
Opposite = x ft
Adjacent = 75ft
Tan40 = x / 75
X = 75 × tan40
X = 75 × 0.8390
X = 62.92ft
The height of the oak tree is 62.9ft
 
        
             
        
        
        
X is 53.33333333 I love helping people out
        
                    
             
        
        
        
Answer:
x < –4 or x ≥ 3
Step-by-step explanation:
 
        
             
        
        
        
The greatest common factor is 6xy