## anonymous 5 years ago Please see attached.

1. anonymous

2. anonymous

Question 1 or 2?

3. anonymous

$arc length = 2\pi r(\frac{C}{360})$ where r is the radius and C is the central angle of the arc in degrees

4. anonymous

question 2

5. anonymous

$sectorarea=\pi r^2 (\frac{C}{360})$

6. anonymous

Since you know r and C of the 4 different sectors, work them out individually and then add the answers together to get the total area :)

7. anonymous

but each side of the sectors has different lengths

8. anonymous

you use the values that involve that sector. for example the sector with the 120 angle with be a side of OB=3cm as a value for r

9. anonymous

for the 45 degree one the sides will be OC=5cm

10. anonymous

the 60 degree will be )A=2cm and the last one (135 degree) is OD=3cm

11. anonymous

does this make more sense? :D

12. anonymous

is OC part of sector 120 degree or 45 degree???

13. anonymous

OC is only a part of the 45 degree sector

14. anonymous

I think I need to read up on sectors.

15. anonymous