Tolonglah akuuuuuuuuuuuuuuuu​

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Tolonglah akuuuuuuuuuuuuuuuu​

Tolonglah akuuuuuuuuuuuuuuuu​

Jawaban:

17. b. 21

18. c. 27

Penjelasan dengan langkah-langkah:

=》17

Keliling = p × l

= 7 × 3

= 21

=》18

Keliling = sisi + sisi + sisi

= 9 + 9 + 9

= 27

Jawaban:

17. (3×2)+(7×2)= 20

18. 9+9+9= 27