Luas sebuah lingkaran 616 cm², π = 22/7.

Penjelasan:

L = 616 cm²

π = 22/7

L = π × r²

616 = 22/7 × r²

r² = 616 ÷ 22/7

r² = 616 × 7/22

r² = 196

r = √196

r = 14 cm

K = 2 × π × r

K = 2 × 22/7 × 14

K = 2 × 22 × 2

K = 88 cm

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