Question

The equation for the circle below is x2 + y2 = 25. What is the length of the circle's radius?

Answer 1

Answer:

The radius of the circle is 5 units.

Step-by-step explanation:

The equation is given as :

$x^{2}+y^{2}=25$

Now the equation form for a circle centered at (h,k) and radius r is given as :

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

We can say that -

$x^{2}+y^{2}=25$ is same like $(x-0)^{2}+(y-0)^{2} =25$

Now we have a circle with center at the origin (0, 0)

And the radius is given as $\sqrt{25}$ = 5

Hence, the radius of the circle is 5 units.

Answer 2

5 is the correct answer.