Answer:Using the slope-intercept form, the y-intercept is 1
 
        
             
        
        
        
Direct computation:
Parameterize the top part of the circle  by
 by

with  , and the line segment by
, and the line segment by

with  . Then
. Then



Using the fundamental theorem of calculus:
The integral can be written as

If there happens to be a scalar function  such that
 such that  , then
, then  is conservative and the integral is path-independent, so we only need to worry about the value of
 is conservative and the integral is path-independent, so we only need to worry about the value of  at the path's endpoints.
 at the path's endpoints.
This requires


So we have

which means  is indeed conservative. By the fundamental theorem, we have
 is indeed conservative. By the fundamental theorem, we have

 
        
             
        
        
        
Answer:
I am attaching a image to understand my proof.
Step-by-step explanation:
PROVE:-
AB = DC
AD = BC
∠ ABD = ∠ BDC        (alternate angles are equal )
∠ DBC = ∠ ADB         (alternate angles are equal )
∴ Δ ADB ≅ Δ CBD     ( by ASA rule )
DC = BA                       ( corresponding sides of ≅ Δ )
AD = CB                        ( corresponding sides of ≅ Δ )
Hence it is proved that opposite sides of parallelogram are congruent )