Question

what is the exact length of ab?

Answer 1

hold on drawing a diagram

Answer 2

find the circumference and scale it to 120 degrees

Answer 3

whats the circumference of circle of radius \(9\) ?

Answer 4

56.55 is the radius

Answer 5

circumference
I mean lol

Answer 6

Excellent, since we don't have a full circle, we need to scale it to whatever the angle we have got

Answer 7

so if I did this problem right its 18 m

Answer 8

circumference of circle = \(\large 2 \pi (9) = 18\pi\)


length around arc AB = \[\huge 18\pi \times \dfrac{120}{360}\]

Answer 9

simplify

Answer 10

leave the answer in terms of \(\pi\) cos they want it exact

Answer 11

18 \pi m\]

Answer 12

is the answere am I right

Answer 13

nope, \(18 \pi\) is the length around FULL circle.

Answer 14

length around AB = \(\large 18\pi \times \dfrac{120}{360} = 6\pi \)

Answer 15

ok I get it this is hard but I get it know I think thank you

Answer 16

glad to hear you got it :) yw!