Problems adapted from questions set for previous Mathematics exams.
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.
|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.