Question

A point T on the y-axis, os 3 units from the point A(-1,2) find the coordinates of T (there are two points T1,T2 say)

and the equation of line AT1 given that T1 is above T2

Answer 1

can you make sense of the picture? Do you know the pythagorean theorem? to find h
T1 will be at (0, 2+h)
where 1^2 + h^2 = 3^2