Option A
The radius of circle is 19.90 cm
<h3><u>Solution:</u></h3>The formula for circumference of circle is given as:
Where,
"C" is the circumference of circle
"r" is the radius of circle
is a constant equal to 3.14
Given that, circumference = 125 cm
To find: Radius of circle
<em><u>Substitute the given value of "C" = 125 in formula</u></em>
Thus radius of circle is 19.90 cm
Answer:
or
Step-by-step explanation:
Well, the center origin of the circle is given (h,k) = (5,7).
We have to find our radius as they gave us a point. from origin to the edge of the circle.
Using the formula: (x - h)^2 + (y - k)^2 = r^2
Plug in our (h,k) = (5,7) and (x,y) = (10,19) to solve for radius.
(x - h)^2 + (y - k)^2 = r^2
(10 - (5))^2 + (19 - (7)^2 = r^2
(5)^2 + (12)^2 = r^2
25 + 144 = r^2
r^2 = 169
r = 13