Question

10PTS PLEASE HELP!!!!!!!

Find the diameter of a circle whose equation is x^2+(y−2)^2=100

400

20

10

100

Answer 1

The equation of a circle:

`(x-h)^2+(y-k)^2=r^2`

(h, k) - a coordinates of the center

r - a radius

A diameter d = 2r

We have

`x^2+(y-2)^2=100\to r^2=100\to r=√(100)\to r=10`

Answer: d = 2 · 10 = 20