SOLUTION: A cirlce has a centre (4,-5), if a diameter is PR and P=(8,1) calculate the coordinates of R.
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Question 836276: A cirlce has a centre (4,-5), if a diameter is PR and P=(8,1) calculate the coordinates of R.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
We use the midpoint formula, but in reverse to get the following
(x+8)/2 = 4
x+8 = 2*4
x+8 = 8
x = 8-8
x = 0
--------------------
(y+1)/2 = -5
y+1 = 2*(-5)
y+1 = -10
y = -10-1
y = -11
So the point R is (0,-11)
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