Question

The midpoint of AB is M(1,4).if the coordinates of A are (-3,-6),what are the coordinates of B

Answer 1

midpoint of AB (M)=(1,4)=(x,y)

COOrdinates of A=(-3,-6)=(X1,Y1)

coordinates of B=?

using midpoint formula,

X=(X1+X2/2)

or,1=(-3+X2/2)

or,2=-3+X2

or,2+3=X2

5=X2

And

Y=(Y1+Y2/2)

or,4=(-6+Y2/2)

or,4×2=-6+Y2

or,8+6=Y2

14=Y2

so,co-ordinates of B are(5,14).

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