Question

The midpoint of QR is M(2, −5). One

endpoint is R(8, -1). Find the
coordinates of the other endpoint Q.
Write the coordinates as decimals or
integers.
Q=

Answer 1

Q= ( -4 -9)

Explanation:

Using the midpoint formula

X1 + X2 Y1 + Y1

----------, ---------

2. 2

The midpoint QR = (2, -5) and R = (-8, 1) Q =>(x, y)

= x + 8. y - 1

------------ = 2 and -------- = -5

2 2

=> (4 = x + 8) and( -10= y-1)

=> 4 -8 = x and -10+1= y

Q(x, y) = (-4, -9)