Question

Find the measure of OC.

Answer 1

OA =radius =13 cm
BA =24 cm
BC =CA =12 cm [Perpendicular from centre to the chord will bisect the chord]
$O{C}^2=O{A}^2-A{C}^2={13}^2-{12}^2=169-144=25OC=\sqrt{25}=5cm$