Two lines intersect and one of the angles formed measures 30°. what are the measures of the other angles?
a. 150
b.90
c.60
d.30
(it can be more than one answer)

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