Question

Help

Answer 1

Think of the diameter as a line, solve for the midpoint of that line to find the center.

Answer 2

And the radius is basically the length from the midpoint to the end of the circle, in this case being one of the other coordinates.

Answer 3

The formula would be

Answer 4

http://www.purplemath.com/modules/midpoint.htm here

Answer 5

Good luck thats all the information i can give.

Answer 6

where are you stuck? are you stuck on the formula given on the page MeowLover17 gave you?

Answer 7

Yes, putting it in.

Answer 8

P(-10,-2) and Q(4,6)

the x coordinates of each point are -10 and 4

add them up: -10+4 = -6

divide the result by 2: -6/2 = -3

so the x coordinate of the midpoint is x = -3

Do the same for the y coordinates to get the y coordinate of the midpoint

Answer 9

very good

Answer 10

Thats it for Part A?

Answer 11

so that's effectively what this formula

\[\LARGE (x_m, y_m) = \left(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2}\right)\]

is saying "add up the corresponding coordinates and divide by 2 to get the midpoint "

Answer 12

Okay, got it. :-)

Answer 13

yes the midpoint of P and Q is the center because P and Q lie on the same diameter