Question

Equal chords of congruent circles are equal distance from the corresponding centers. In the
given figure; o is the center of the circle. Angle OBA=20 DEGREE and Angle OCA=30 DEGREE
then find Angle BAC.

Answer 1

<abo=<bao=20[alt.int.] . <aco=<cao=30[alt.int.]. <BAC=<BAO+<CAO
<BAC=20+30
<BAC=50