## Exam-Style Questions.## Problems adapted from questions set for previous Mathematics exams. |

## 1. | IB Standard |

The following diagram shows a circle with centre O and radius 9 cm.

The points A, B and C lie on the circumference of the circle, and AÔC = 1.2 radians.

(a) Find the length of the arc ABC.

(b) Find the perimeter of the minor sector OAC.

(c) Find the area of the minor sector OAC.

## 2. | IB Analysis and Approaches |

The following diagram shows part of a circle with centre O and radius 10cm.

Chord PQ has a length of 12cm and angle PÔQ = ?.

(a) Find the value of ?, giving your answer in radians.

(b) Find the area of the sector shaded green.

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