Question

(50 Points)

Find the length of AB. Leave your answer in terms of pi.
Enter a decimal rounded to the tenth.

Answer 1

(16/9)pi

Explanation:

Where we firstly convert our angle at the centre(O) into radians

40/180 × pi = (2/9)pi

;Then Length of arc AB = radius × angle at O in radians

Arc AB = 8 × (2/9)pi

;Length AB = (16/9)pi