28. Which lines are parallel? A. a and b B. a and c C.b and d D. b and c 29. What is the measure of Z 2? A. 30 B. 70 C. 80 D. cannot be determined 30. What is the measure of each angle of an equiangular triangle? A 30 B. 60 C. 45 D. 90 31. What angle formed by two radii of a circle with its vertex in the center of the circle? A. Acute angle B. Central angle C. Obtuse angle D. Right angle 32. What do you call a chord which passes through the center of a circle? A. Chord B. Diameter C. Radius D. Tangent 33. What do you call a line segment that joins the center of the circle to a point of the circle? A. Chord B. Diameter C. Radius D. Tangent 34. Which of the following is a segment whose endpoints are any two points on the circle? A. Chord B. Diameter C. Radius D. Tangent
