Question

The equation of a circle is shown below.

(x -5)2 + (y + 2)2 = 64

The radius of the circle is ________ units

Answer 1

@Mousam

Answer 2

hint:

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

is a circle with a radius of r

Answer 3

it also has the center of (h,k)

Answer 4

ohh

Answer 5

so what is r in this case

Answer 6

sorry, i was helping someone else...

Answer 7

64

Answer 8

that's r^2

Answer 9

if r^2 = 64, then what is r?

Answer 10

64*64

Answer 11

@jim_thompson5910

Answer 12

no, you need to find a whole number such that when you multiply it by itself, you get 64

Answer 13

@Scroll0405 since @jim_thompson5910 said that r^2 =64...to find r, we need to square root both side

Answer 14

ex: if r^2 = 36 then r = 6 since

r^2 = 6^2 = 6*6 = 36

Answer 15

8*8

Answer 16

=64

Answer 17

good, so r = 8

Answer 18

yup...

Answer 19

thank u

Answer 20

so is that the anwer

Answer 21

yup
the radius is 8