Question

Chords AC and BD intersect at the center of circle ABCD. Which is the measure of the minor arc AB?

Answer 1

help?

Answer 2

call the centre of the circle O.

then angle AOB is supplementary to angle AOD

the arc AB subtends the angle AOB... so there should be enough clues in that

Answer 3

Yes, campbell_st is right. a circle has a total of 360 degrees. so subtract 240 from 360 then divide the result by 2 to find AOB.