Hi guys, I have no clue to this question. Any help is appreciated. Ty.

The length of a pendulum is 20cm. If the tip of the pendulum swings through an angle of 86 degrees, find :

a) The arc length ABC (the distance through which the tip travels)

b) The area of triangle OAC.

c) The area of the sector.

d) The area of the minor segment.

e) The length BX.