c ll en 15 Write the standard equation of each circle a b c

c. ll en 15. Write the standard equation of each circle a. b. c.

15.

Equation of circle is (x-a)^2 + (y-b)^2 = r^2, where a,b is where center of circle is with radius of r

a.
r = 5, and center is at origin(0,0)
(x-0)^2 +(y-0)^2 = 5^2
x^2+y^2 = 25

b.
r = 5, and center is at (4,3)
(x-4)^2 +(y-3)^2 = 5^2 = 25

c.
r = 3, and center is at (5,4)
(x-5)^2 + (y-4)^2 = 3^2 = 9