SOLUTION: state the radius of the circle defined by each equation and give the coordinates of one point on the circle. a) x^2+y^2=49 b) x^2+y^2=15 c) x^2+y^2=64 d)x^2+y^2=1.44

Algebra ->  Circles -> SOLUTION: state the radius of the circle defined by each equation and give the coordinates of one point on the circle. a) x^2+y^2=49 b) x^2+y^2=15 c) x^2+y^2=64 d)x^2+y^2=1.44      Log On


   

Question 841221: state the radius of the circle defined by each
equation and give the coordinates of one point
on the circle.
a) x^2+y^2=49
b) x^2+y^2=15
c) x^2+y^2=64
d)x^2+y^2=1.44
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
x^2+y^2=49 

radius = sqrt%2849%29 = 7,  (±7,0) and (0,±7) are points on the circle

b) x^2+y^2=15

radius = sqrt%2815%29,  (%22%22+%2B-+sqrt%2815%29,0) and (0,%22%22+%2B-+sqrt%2815%29) are points on the circle

 c) x^2+y^2=64

radius = sqrt%2864%29 = 8,  (±8,0) and (0,±8) are points on the circle


d)x^2+y^2=1.44

radius = sqrt%281.44%29 = 1.2,  (±1.2,0) and (0,±1.2) are points on the circle

Edwin