A circle in the xy‑plane has the equation
(x+92)^2+(y+54)^2=73.

What is the length of the diameter of the circle?

Question

A circle in the xy‑plane has the equation 
(x+92)^2+(y+54)^2=73. 

What is the length of the diameter of the circle?

welshfella · Answer

the general form of a circle is

(x - a)^2 + (y - b)^2 = r^2


where r = radius

desmarie · Answer

thanks :)

welshfella · Answer

yw

desmarie · Answer

since they already included the 73 am I suppose to still square that or is that the official answer?

desmarie · Answer

@welshfella 
@jim_thompson5910

rayaz · Answer

The 73 has been obtained by squaring sqrt(73) so there is no need to square it again.

desmarie · Answer

ok thanks ....sorry that I cant medal you I already chose someone else

rayaz · Answer

No problem. Did you understand how to solve it?

desmarie · Answer

ehhh

jim_thompson5910 · Answer

match up the r^2 and the 73

this means

$$\Large r^2 = 73$$

$$\Large r = \sqrt{73}$$

jim_thompson5910 · Answer

That will give you the radius. Double it to get the diameter.

desmarie · Answer

geez jim.....you are a GENIUS!!

desmarie · Answer

so the answer is 2rad73......correct?