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=4(10cm+8cm+6cm)
=4.24cm
=96cm
C
19. L alas persegi=s²
=(6cm)²
=36cm²
T=5cm
V=1/3Luas Alas.t
=1/3.36cm².5cm
=12cm².5cm
=60cm³
C
20. panjang sisi alas=10cm
tinggi=12cm
luas sisi tegak=4.Lsegitiga
Mencari tinggi sisi tegak
C=√A²+√B²
C=√5²+√12²
C=√25+√144
C=√169
C=13cm
L sisi tegak=4.L segitiga
=4.1/2.alas.tinggi
=4.1/2.13cm.5cm
=2.65cm²
=130cm²
A
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