Posted by Peter on Thursday, October 28, 2010 at 2:41am.
Determine the diameter of the largest circle that can be drawn between the parallel lines y=2x and y=2x-5.
MATH - bobpursley, Thursday, October 28, 2010 at 2:54am
What is the distance between them?
find the perpendicular line
y=-1/2 x + b
pick a point on the first line: say, 1,2
2= -1/2 *1+b
y= -.5x+2.5 is the perpendicular line.
now, what point does this line intersect the second parallel line?
distance between points 1,2 and 3,1
d= sqrt (2^2 + 1^2)=sqrt5
check all that math, I did it in my head.
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