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Sauron [17]
2 years ago
8

Three vertices of parallelogram DEFG are D(-4,-2), E(-3,1) and F(3, 3). Find the coordinates of G.

Mathematics
1 answer:
Olin [163]2 years ago
8 0

Answer:

Coordinates of G = (2,0)

Step-by-step explanation:

Given: Three vertices of parallelogram DEFG are D(-4,-2), E(-3,1) and F(3, 3).

To find: coordinates of G

Solution:

Midpoints of a side joining points (a,b),\,(c,d) are given by (\frac{a+c}{2},\frac{b+d}{2})

Diagonals of a parallelogram bisect each other.

So,

Midpoint of DF = Midpoint of EG

Midpoint of DF = (\frac{-4+3}{2},\frac{-2+3}{2})=(\frac{-1}{2},\frac{1}{2})

Midpoint of EG = (\frac{-3+x}{2},\frac{1+y}{2})

Let coordinates of G be (x,y)

Therefore,

(\frac{-1}{2},\frac{1}{2})  =(\frac{-3+x}{2},\frac{1+y}{2})\\\\\frac{-1}{2}=\frac{-3+x}{2},\,\frac{1}{2}=\frac{1+y}{2}\\\\-1=-3+x,\,1=1+y\\\\x=-1+3,\,y=1-1\\x=2,\,y=0

So,

Coordinates of G = (2,0)

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