Question

"write the standard form of the equation of the circle with radius 7 and center at (0, 0)."

Answer 1

Try this solution:

1. the standart form of the circle is: (x-x₀)²+(y-y₀)²=r², where point (x₀;y₀) - the cetre of the given circle, r - radius of the given circle.

2. Using r=7 and coordinates of the centre (0;0) it is possible to make up the required equation:

(x-0)²+(y-0)²=7²;

x²+y²=49.