Which statements about the figure must be true? check all that apply.
dbc is bisected by ray bd.
abc is bisected by ray bd.
bc = ac
ab = ac
2mdbc =

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units