Please help with this i am not sure if it is b

Acircle has a circumference of 28.36 units what is the diameter of the circle

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

5. which description does not guarantee that a quadrilateral is a squar ajo is a parallelogram with perpendicular diagonals 0% has all sides congruent and all angles congruent o has all right angles and has all sides congruent 10% is both a rectangle and a rhombus 30%