<p>Please help!!
It's a medium question, but I really dont understand this questions, please explain</p>
<p>CB Blue book, page 806, Question 13</p>
<p>It would help if you showed the actual problem in your post - not all of us have the CB Blue book.</p>
<p>Thank you, optimizerdad! I'm glad I'm not the only one peeved at that. I wanted to have a go at the problem too but I don't have the book.</p>
<p>Yeah, I know , I always put the question on internet, but this problem is concerning a XY-coordinate system, so it's impossible for me to put the image online</p>
<p>you can draw it in paint</p>
<p>Ok I will try to type how the picture look like.
The problem is asking for a slope of two middel point of circles.</p>
<p>Both circles lowest point is the Y-as, so thats is (0,0)
the first circle highest point is (3,6)
tHE second circle highest point is (11,10)</p>
<p>Btw. Is the term CONGRUENT pertaining to angles and not length??</p>
<p>mm, nvm let me try</p>
<p>What you need in the problem are the x and y coordinates of both center points. Since the x coordinates of Q and S will be the same as the x coordinates of P and R, respectively, you already have half of the problem. Since you also know Q and S are center points and the circles are tangent to the x axis, they are half of the P and R y coordinates, respectively. Merely divide 6 by 2 and then 10 by 2 to get the center points' y coordinates. Now you have both the x and y coordinates. Q = (3,3) S = (11, 5). Once you have figured this out it is fairly simple to find the slope, (5-3)/(11-3) = 2/8 = 1/4.</p>
<p>does 4/8 not equal 1/2</p>
<p>damn I am stupid, forgot to divide the diameter of the circle to find the right lenght for the slope</p>
<p>But I am correct that Congruent is pertaining to Angles and not lenght of triangles</p>
<p>haha yes izzy is right, sorry about last post, rused in without giving it somethough</p>
<p>The lines drawn are diameters of the circles. Q and S are the centers of the circles, and therefore the midpoints of the diameters. Therefore, the location of Q is the midpoint between (0,0) and (6,3): (3,3); S is the midpoint between (0,0) and (11,10): (11,5).</p>
<p>The slope is delta y / delta x = (5-3)/(11-3) = 2/8 = 1/4 --> the answer is B.</p>