# diameter of a circle

• May 14th 2010, 09:45 PM
henry
diameter of a circle

Q. the point (4,-3) is on one end of the diameter of a circle centre (6,5). Find the coordinates on the point on the opposite end of that diameter.
• May 14th 2010, 09:53 PM
sa-ri-ga-ma
Quote:

Originally Posted by henry

Q. the point (4,-3) is on one end of the diameter of a circle centre (6,5). Find the coordinates on the point on the opposite end of that diameter.

Center is the mid point of the opposite points of a diameter. If (x, y) are the co-ordinates of the other end of the diameter, then
find the mid point of the diameter and equate it to the co-ordinates of the center.
• May 14th 2010, 09:54 PM
11rdc11
Quote:

Originally Posted by henry

Q. the point (4,-3) is on one end of the diameter of a circle centre (6,5). Find the coordinates on the point on the opposite end of that diameter.

$\frac{5-(-3)}{6-2}=\frac{8}{2}$

$6+2= 8$
$5 + 8 = 13$