hitung lah
a. banyak sisi bangun
b.volume
c.luas permukaan
CEPAT NANTI FOLLOW
a. banyak sisi bangun
b.volume
c.luas permukaan
CEPAT NANTI FOLLOW
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diketahui:
tabung
d = 21 cm --> r = 21/2 cm
t = 20 cm
ditanya :
a. banyak sisi bangun?
b. volume?
c. luas permukaan?
Jawab :
a. banyak sisi bangun : 3 bidang sisi
b. V = πr²t
= 22/7 x 21/2 x 21/2 x 20
= 22 x 3 x 21 x 5
= 6.930 cm³
c. LP = 2πr (r + t)
= 2 x 22/7 x 21/2 (21/2 + 20)
= 22 x 3 x 30,5
= 2.013 cm²
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