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= 22/7 × 35
= 110 cm
d = 35 cm
maka r = 17,5 cm
Luas = пr²
= 22/7 × 17,5 × 17,5
= 961,625 cm²
r = 17,5 cm
keliling = 2phi r
keliling = 2 . 22/7 . 17'5
keliling = 110 cm
luas = phi r²
luas =22/7 . (17,5)²
luas = 22/7 . 306,25
luas = 962,5 cm²