tolong dong kak.. pr nya dikumpulin besokk

8.
keliling
= 2 phi r
= 2. 22/7 . 14
= 2. 22. 2
= 88

9.
luas
= phi r^2
= 22/7 . 56 . 56
= 22 . 8. 56
= 176 . 56
= 9856

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