Avicennaa
3. a. luas alas L = 1/2 x alas x tinggi = 1/2 x 5 x 12 = 30 m2 b.Volume prisma Vp = luas alas x TP = 30 x 12 = 36 cm3 c.luas prisma cari sisi miring Δ = = √169 = 13 Lp = ( 2 x luas alas) + ( keliling x TP) = ( 2 x 30 ) + ( 12 + 5 + 13 ) x 12 = 60 + 360 = 420 cm2
4. a. panjang rusuk alas Volume = 1/3 x luas alas x TL 512 = 1/3 x S² x 6 512 x 3 = 6 s² 1536 = 6 s² s² = 256 s = √256 s = 16 b.luas limas tinggi rusuk tegak = = √100 = 10 Ls = luas alas + luas selubung = ( s x s) + ( 4 x 1/2 x alas x tinggi) = ( 16 x 16 ) + ( 4 x 1/2 x 16 x 10) = 256 + 320 = 576
5. a. tinggi limas TL = = 24 b.Volume limas VL = 1/3 x luas alas x TL = 1/3 x 14 x 14 x 24 = 1568
a. luas alas
L = 1/2 x alas x tinggi
= 1/2 x 5 x 12
= 30 m2
b.Volume prisma
Vp = luas alas x TP
= 30 x 12
= 36 cm3
c.luas prisma
cari sisi miring Δ =
= √169
= 13
Lp = ( 2 x luas alas) + ( keliling x TP)
= ( 2 x 30 ) + ( 12 + 5 + 13 ) x 12
= 60 + 360
= 420 cm2
4.
a. panjang rusuk alas
Volume = 1/3 x luas alas x TL
512 = 1/3 x S² x 6
512 x 3 = 6 s²
1536 = 6 s²
s² = 256
s = √256
s = 16
b.luas limas
tinggi rusuk tegak =
= √100
= 10
Ls = luas alas + luas selubung
= ( s x s) + ( 4 x 1/2 x alas x tinggi)
= ( 16 x 16 ) + ( 4 x 1/2 x 16 x 10)
= 256 + 320
= 576
5.
a. tinggi limas
TL =
= 24
b.Volume limas
VL = 1/3 x luas alas x TL
= 1/3 x 14 x 14 x 24
= 1568