<em><u>Answer:</u></em>
The radii are OA , OB and OC
<em><u>Explanation:</u></em>
<u>The radius of the circle</u> is defined as the line joining between the center of the circle and a point that lies on the circumference of the circle
<u>In the given circle:</u>
The center is "O"
The three points that lie on the circumference are A, B and C
<u>Based on the above definition, the three radii would be:</u>
OA, OB and OC
Hope this helps :)