Question

Give the center and radius in each of the following circles.Circle a

Answer 1

ANSWER

• Center: (0, 0)

,

• Radius: 3

EXPLANATION

The equation of a circle has the form,

$(x-h)^2+(y-k)^2=r^2$

Where the center is (h, k) and r is the radius of the circle.

For circle a, we have the equation,

$x^2+y^2=9$

So, the center is (0, 0) and the radius is 3, since 3² = 9.