Question

AOB is a sector of a circle, centre O.

50°
6 cm
B
Not to scale
Calculate the length of arc AB, correct to 3 significant figures.
(3 marks)

Answer 1

Answer: 5π/3 (5,236)

Step-by-step explanation: Length of the whole circle arc is 2πr, in this case it is 12π. 50° is 50/360 = 5/36 part of the arc, so we can multiply 12π by 5/36 to get an answer. 12π * 5/36 = 5π/3.