whongaliem1) d.bidang = s√2 12√2 = s√2 s = 12√2 / √2 s = 12 cm d.ruang = s√3 = 12√3 cm ... jawaban : C
2) p.seluruh rangka = 12 x s 2,16 m = 12 x s 216 cm = 12 x s s = 216/12 s = 18 cm L seng = L.permukaan kubus = 6 x s² = 6 x 18² = 1944 cm² .... jawaban : B
3) d.ruang = s√3 10√3 = s√3 s = 10√3 / √3 s = 10 cm isi kubus = 3/5 x volume = 3/5 x s³ = 3/5 x 10³ = 3/5 x 1000 = 600 cm³ ... jawaban : A
12√2 = s√2
s = 12√2 / √2
s = 12 cm
d.ruang = s√3
= 12√3 cm ... jawaban : C
2) p.seluruh rangka = 12 x s
2,16 m = 12 x s
216 cm = 12 x s
s = 216/12
s = 18 cm
L seng = L.permukaan kubus
= 6 x s²
= 6 x 18²
= 1944 cm² .... jawaban : B
3) d.ruang = s√3
10√3 = s√3
s = 10√3 / √3
s = 10 cm
isi kubus = 3/5 x volume
= 3/5 x s³
= 3/5 x 10³
= 3/5 x 1000
= 600 cm³ ... jawaban : A