Question

Write the equation of a circle with a center at (5, 5) and a diameter of 13.

Answer 1

(x – 5)^2 + (y – 5)^2 = 42.25

(x + 5)^2 + (y + 5)^2 = 169

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

(x + 5)^2 + (y + 5)^2 = 42.25

Answer 2

it has to be between a and c

Answer 3

Hint: what's the distance formula (Pythagorean Theorem)?

Answer 4

not sure.. :/

Answer 5

number on the right = r^2 (radius squared)
and radius = half diameter

Answer 6

ok...

Answer 7

soo 13^2?

Answer 8

noo - 13 = diameter

Answer 9

so half of 13

Answer 10

6.5?

Answer 11

general equation of circle is

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

yes r = 6.5

Answer 12

thats not one of the choices though

Answer 13

(a,b) is center

Answer 14

r^2 not r

Answer 15

6.5^2

Answer 16

ok! i see....so it would be d not a correct?

Answer 17

@cwrw238
?

Answer 18

its (x-a)^2 right?
and a = 5
so thats (x-5)

is that a or d?

Answer 19

A

Answer 20

thanks @cwrw238

Answer 21

yes