Kak tolongin yah besok di kumpulin

1. r = 7 cm
    luas = πr²
            = 22/7 x 7²
            = 22 x 7 x 7 = 154 cm²
2. r = 10
    luas = πr²
            = 3,14 x 10²
            = 3,14 x 10 x 10 = 314 cm²
3. r = 28
    luas = πr²
            = 22/7 x 28 x 28 = 2464 cm²
4. r = 36
    luas = πr²
            = 3,14 x 36 x 36 = 4069, 44 cm²

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