Look at your "circle" theorems. You should find one that says "In the same or congruent circles, congruent chords subtend (cut off) congruent arcs."
According to the diagram, both chords have length 6, so the arcs of the circle cut off by those chords must have the same degree measure (and the same arc length).
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.