Question

If C(2,3)is the centre of circle and A(1,-2)is one end of the diameter AB,find the coordinate of B.

Answer 1

(3,8) because if you find the change in values, A is -1 in the x value, and -5 in the y value. So if you make them posistive because you are going the opposite direction, you add them to C and get (2+1=3,3+5=8) or (3,8)