How do you write the equation in standard form of the circle center at P(2, -5) and a diameter of 8 units?
1 Answer
Jan 25, 2016
(x−2)2+(y+5)2=64
Explanation:
The standard form of the equation of a circle is :
(x−a)2+(y−b)2=r2 where (a , b ) are coordinates of centre and r , the radius.
In this question (a , b ) = (2 , - 5 ) and r = 4 ( since d = 8 )
equation is :
(x−2)2+(y+5)2=16
