9th math quiz Quiz

Question Number 1 The longest chord of a circle is A. radius B. diameter C. none of these Question Number 2 what is the value of (3+2.5)(3-2.5) A. 15.25 B. 9 C. 14.25 Question Number 3 the angle subtended by the perpendicular bisector of a chord of the circle at the ends of the chord? A. 30 degrees B. 45 degrees C. 90 degrees D. 120 degrees E. 0 degrees F. 15 degrees