Keliling lingkaran 31,4 luas lingkaran tsbt====================otw 35k poin.-.​

keliling = 31,4

k = 2πr

31,4 = 2 x 3,14 x r

31,4 = 6,28r

r = 5 cm

luas

πr²

3,14 x 5²

3,14 x 25

78,5 cm²

semoga membantu

SOAL 1

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K = 2 × π × r

31,4 = 2 × 3,14 × r

31,4 = 6,28 × r

r = 31,4/6,28

r = 5 cm

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L = π × r²

L = 3,14 × 5²

L = 3,14 × 25

L = 78,5 cm²

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