Area of Circular Sectors

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1.
1 point
#1 Circle O
2.
1 point
#3 sector AOB
3.
1 point
#5 Circle P
4.
1 point
#6 Triangle RPS
5.
1 point
#7 sector RPS
6.
1 point
#8 the shaded segment (use pi and round to the nearest hundredth for this problem!)
7.
1 point
#9
8.
1 point
#10
9.
1 point
#11
10.
1 point
#12
11.
1 point
#13
12.
1 point
#14
13.
1 point
#15
14.
1 point
#16
15.
1 point
#17
16.
1 point
#18 (Round to the nearest tenth)