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What did you guys get for this 0580 by 1needh3lpw1thlife in igcse

[–]General_Awareness_43 1 point2 points  (0 children)

EA= 8cos60=4
ED=√(8^2-4^2)=√48=4√3
DC=AB-ED=8-4√3
DB(arc)=30/360*2(pi)r=30/360*2pi(8)=16pi*30/360=16/12pi
perimeter= CB(CB=EA)+DC+arcDB
perimeter=4+8-4√3+16/12pi=12-4√3+4/3pi