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3. diameter kita ubah menjadi jari''28:2=14
luas
22 per 7 × 14 × 14=616
4.s×s=29×29=841
ak cuma tau itu klo lain agak susah dimengerti...
smoga bermanfaat..
sorry klo salah
Matematika SD Kelas V
1] d = 21 cm
r = d/2
= 21/2
= 10,5 cm
luas permukaan tabung = 2 x π x r x (r + t)
= 2 x (22/7) x 10,5 x (10,5 + 35)
= 22 x 3 x 45,5
= 3.003 cm²
2] Balok
Volume = p x l x t
= 25 x 18 x 3,8
= 1.710 cm³
3] Lingkaran
r = d/2
= 28/2
= 14 cm
luas = π x r x r
= (22/7) x 14 x 14
= 616 cm²
4] Kubus
Luas permukaan = 6 x s x s
= 6 x 29 x 29
= 5.046 cm²
5] Persegi
Luas = 484
s² = 484
s = √484
s = 22 cm