Question

Can anyone find the length of AO?

Answer 1

Hello from MrBillDoesMath!

Answer:   2

Description. Create a line from point A perpendicular to the x axis. This line, with the radius (OA) , and x axis, form a right triangle. By Pythagoras,

     x-length             y-length                         hypotenuse squared

  ( 3 ^ (1/2) ) ^ 2    +  1 ^ 2             =  3 + 1    = 4

So, the square of the hypotenuse (or radius OA in this case) is 4. That means OA is the square root of 4 or 2.

Regards, MrB