Question 1146887
Points (-3,2) and (1,8)  are endpoints of the diameter of a circle. 
 
 (a) What is the length of the diameter? Give the exact answer, simplified as much as possible.
It's the distance between the 2 points.
{{{d = sqrt(diffx^2 + diffy^2)}}}
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(b) What is the center point C of the circle?
The midpoint between the 2 points.
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(c) Given the point C you found in part (b), state the point symmetric to C about the x-axis.