Question

Find the standard equation of the circle passing thru a given point with a given center::

center (1,5) passing thru (3,2)

Answer 1

@LindseyLou877 Do you know circle formula?

Answer 2

no

Answer 3

Please find it from your note or textbook, then I'll show you how to plug the numbers in!

Answer 4

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

Answer 5

?

Answer 6

im taking a timed quiz and cant figure ths one out

Answer 7

Great :) Try to memorize it!
Center ( h, k) = ...?

Answer 8

1 and 5

Answer 9

Now, plug the center into (x -h)² + ( y-k)²
= ... ?

Answer 10

I can get that far.. this is where I am having the problem and I am running outta time

Answer 11

Plug 1 into where h is, similarly plug 5 ....

Answer 12

and thats my answer?seems too simple

Answer 13

Follow my instruction, plug them in and show me on HERE!

Answer 14

(X-1)^2+(y-5)^2=

Answer 15

r^2

Answer 16

Which is the distance! Do you know distance formula?

Answer 17

no

Answer 18

I have to hurry in order to get this in time

Answer 19

I don't like short "no", please find the formula yourself if you want to learn!

Answer 20

I get sq rt 13 when i used distance formula

Answer 21

Correct, now R= 13
Plug it into the right side, that's it!

Answer 22

I am having a probem figuring out how to write this out

Answer 23

(x-1)^2+(y-5)^2=13

Answer 24

or
(x-1)² + ( y -5)² = (√ 13)²

Answer 25

do i need the sq rt sign in my answer or not ?

Answer 26

I hope you memorize the formula from now on, because it's plain simple to plug the data in!
Keep in mind that you'll fail the test by saying "no"!

Answer 27

It's better to keep (√ 13)², as in the formula r²

Answer 28

it says to simplify thou so

Answer 29

Either way is fine, because (√ 13)² = 13, the same result!

Answer 30

Of course I know the formulas, but what the point because YOU are the one will taking the test, not me!