Higher November 2017 Paper 5 Q1

OCRHigherCurrent spec2 marksCircles & Sectors

1 The diagram shows a circle, centre O.

Circle with centre O; a straight line A touches the circle at one point; a chord near the bottom cuts off a shaded region B

Write down the mathematical name of

(a) line A, [1]
(b) shaded region B. [1]