Question

Please see attached.

Answer 1

Question 1 or 2?

Answer 2

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

Answer 3

question 2

Answer 4

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

Answer 5

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 :)

Answer 6

but each side of the sectors has different lengths

Answer 7

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

Answer 8

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

Answer 9

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

Answer 10

does this make more sense? :D

Answer 11

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

Answer 12

OC is only a part of the 45 degree sector

Answer 13

I think I need to read up on sectors.

Answer 14

thanks for your help

Answer 15

I think it might have to do with the diagram, it is a little confusing. No worries (: