bantuin Jawab yg nomer 3 yhaa,,pake cara+jangan ngasal
Jawab:
Penjelasan dengan langkah-langkah:
2. a. p = 12 ; l = 8
Keliling = 2 (p + l)
Keliling = 2 (12 + 8)
Keliling = 2 (20)
Keliling = 40 cm.
Luas = p x l
Luas = 12 x 8
Luas = 96 cm²
b. s = 15
Keliling = 4 (s)
Keliling = 4 (15)
Keliling = 60 cm.
Luas = s²
Luas = 15²
Luas = 225 cm²
3. a. p = 21 cm ; l = 72 mm = 7.2 cm
Keliling = 2 (p + l)
Keliling = 2 (21 + 7.2)
Keliling = 2 (28.2)
Keliling = 56.4 cm.
Luas = p x l
Luas = 21 x 7.2
Luas = 151,2 cm²
b. p = 34 m ; l = 2.2 dam = 22 m
Keliling = 2 (p + l)
Keliling = 2 (34 + 22)
Keliling = 2 (56)
Keliling = 112 m.
Luas = p x l
Luas = 34 x 22
Luas = 748 m²
c. p = 165 mm ; l = 14 cm = 140 mm
Keliling = 2 (p + l)
Keliling = 2 (165 + 140)
Keliling = 2 (305)
Keliling = 610 mm.
Luas = p x l
Luas = 165 x 140
Luas = 23.100 mm²
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