Jawaban:
a. keliling = 2 x (p + l) = 2 x (10 + 9) = 2 x 19 = 38 cm
luas = p x l = 10 x 9 = 90 cm²
b. lebar = keliling : 2 - panjang = 56 : 2 - 12 = 28 - 12 = 16 cm
luas = p x l = 12 x 16 = 192 cm²
c. panjang = keliling : 2 - lebar = 46 : 2 - 15 = 23 - 15 = 8 dm
luas = p x l = 8 x 15 = 120 dm²
Penjelasan dengan langkah-langkah:
sudah jelas di keterangan jawaban
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Jawaban:
a. keliling = 2 x (p + l) = 2 x (10 + 9) = 2 x 19 = 38 cm
luas = p x l = 10 x 9 = 90 cm²
b. lebar = keliling : 2 - panjang = 56 : 2 - 12 = 28 - 12 = 16 cm
luas = p x l = 12 x 16 = 192 cm²
c. panjang = keliling : 2 - lebar = 46 : 2 - 15 = 23 - 15 = 8 dm
luas = p x l = 8 x 15 = 120 dm²
Penjelasan dengan langkah-langkah:
sudah jelas di keterangan jawaban