#1**+1 **

Unless I have made a mistake with my drawing I do not think there is a set answer to this question.

I have two different sketches here that both match the data given and angle ABC has 2 diferent values.

Namely 50 degrees and 48 degrees. I suppose the answers are close. Maybe it is rounding error in the construction.

Angle ABC will always be a half of angle AOC though.

(The angle at the centre is twice the angle at the circumference when botha standing on the same arc )

Here is a link to the interactive diagram. https://www.geogebra.org/classic/gdpx2ktn

MelodyNov 19, 2022