If (-2,-1),(a, 0),(4,6) and (1,2) are the verrtises of a parallelogram find A mad B
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Midpoints are equal in parallelogram
Midpoint of AC
x=(x1+x2)/2 , y=(y1+y2)/2
x=-2+4/2 , y=-1+b/2
x=1,y=-1+b/2
Midpoint of BD
x=a+1/2 ,y=0+2/2
x=a+1/2 , y=1
Midpoint of AC=Midpoint of BD
a+1/2=1 , -1+b/2=1
a+1=2,-1+b=2
a=1, b=3
Midpoint of AC
x=(x1+x2)/2 , y=(y1+y2)/2
x=-2+4/2 , y=-1+b/2
x=1,y=-1+b/2
Midpoint of BD
x=a+1/2 ,y=0+2/2
x=a+1/2 , y=1
Midpoint of AC=Midpoint of BD
a+1/2=1 , -1+b/2=1
a+1=2,-1+b=2
a=1, b=3
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