The diameter length is 30.
We know that the general equation for a circle is(x−h)²+(y−k)²=r²,
where ( h, k ) is the center and r is the radius.
As we know form of a circle.
We will use this form to determine the diameter of the circle.
(x−h)²+(y−k)²=r²
Given equation is :
(x-7)²+(y-2)²=225
(x-7)²+(y-2)²=(15)²
On comparing the above equation with the with equation of circle, we have
r²=(15)²
r=15
So, the diameter will be the twice the radius.
diameter= 2r
diameter= 2*15
diameter= 30
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