Best Answer

Equation of a circle centre the origin is:

x2 + y2 = radius2

⇒ radius = √9 = 3.

Q: What is the radius for a circle with the equation x2 plus y2 equals 9?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..

Radius = 1111

7

x^2+y^2=36

The radius is sqrt(12) = 3.464 (rounded)

Related questions

Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..

Radius = 1111

If that equals 16 then the radius is 4

9

8

7

x^2+y^2=36

That's the equation of a circle with its center at the origin and a radius of 8.

The radius is sqrt(12) = 3.464 (rounded)

The ' 1 ' in that equation is the radius.

A circle centre (0, 0) and radius r has equation x² + y² = r² The circle x² + y² = 36 has: r² = 36 → radius = 6

3 (which is the sqrt of 9)