Question

Write an equation of a circle if the endpoints of the diameter of the circle are (0,3) and (0,-4)

Answer 1

d= -4 - 3 = -7
circle equation
(x-h)^2 + (y-k)^2 = r^2
x^2 + y^2 = 3.5^2

Answer 2

I don't get it cuz I got (x-0)^2+(y-1/2)^2=2.5

Answer 3

Is that right?

Answer 4

i don't think so

Answer 5

So how do u do it

Answer 6

let me work on it one sec

Answer 7

x^2+(y+0.5)^2=(7/2)^2

Answer 8

ya, that is correct

Answer 9

how did you get that though?

Answer 10

Rotate it around to the x-axis, apply the formula and swap x and y back again.

Answer 11

on scratch paper?

Answer 12

Sure, try it, it's easier to do than explain...

Answer 13

and what formula?

Answer 14

(x-a)^2+(y-b)^2 = r^2

Answer 15

oh, sorry, i didn't read that up there

Answer 16

ok, thank you for your explanation, it has been very enlightening.

Answer 17

u r welcome

Answer 18

Thanks to both of u