
latihan 1
Presentation
•
Mathematics
•
8th Grade
•
Hard
Ahmad Zulfikri
FREE Resource
16 Slides • 3 Questions
1
Volume Bangun Ruang
2
Replace this with your body text.
Duplicate this text as many times as you would like.
volume limas
3
Multiple Choice
Volume bangun di atas adalah ... kubus satuan
54
64
74
84
4
Multiple Choice
Sebuah kubus dengan ukuran panjang tiap rusuknya 27 cm. Volume kubus tersebut adalah ... cm3
16.623
17.633
18.643
19.683
5
volume limas
Oleh : Ahmad Zulfikri
6
7
Contoh nyata bentuk limas
Piramida, Mesir
Louvre Museum, Prancis
Masjid Agung Demak
8
MATERI
9
Hubungan kubus dengan limas
A
B
D
C
E
F
H
G
T
a
a
a
A
B
D
C
T
a
a
a
𝑉𝑜𝑙𝑢𝑚𝑒 𝐾𝑢𝑏𝑢𝑠 = _______ × 𝑉𝑜𝑙𝑢𝑚𝑒 𝑙𝑖𝑚𝑎𝑠
10
𝑉𝑜𝑙𝑢𝑚𝑒 𝐾𝑢𝑏𝑢𝑠 = 3 × 𝑉𝑜𝑙𝑢𝑚𝑒 𝑙𝑖𝑚𝑎𝑠
𝑠3= 3 × 𝑉𝑜𝑙𝑢𝑚𝑒 𝑙𝑖𝑚𝑎𝑠
𝑎3= 3 × 𝑉𝑜𝑙𝑢𝑚𝑒 𝑙𝑖𝑚𝑎𝑠
𝑎 × 𝑎 × 𝑎 = 3 × 𝑉𝑜𝑙𝑢𝑚𝑒 𝑙𝑖𝑚𝑎𝑠
(𝑎 × 𝑎) × 𝑎 = 3 × 𝑉𝑜𝑙𝑢𝑚𝑒 𝑙𝑖𝑚𝑎𝑠
𝑙𝑎𝑙𝑎𝑠 × 𝑎 = 3 × 𝑉𝑜𝑙𝑢𝑚𝑒 𝑙𝑖𝑚𝑎𝑠
𝑙𝑎𝑙𝑎𝑠 × 𝑡 = 3 × 𝑉𝑜𝑙𝑢𝑚𝑒 𝑙𝑖𝑚𝑎𝑠
𝑉𝑜𝑙𝑢𝑚𝑒 𝑙𝑖𝑚𝑎𝑠 = 1
3 (𝑙𝑎𝑙𝑎𝑠 × 𝑡)
→ 𝑎 = 𝑡(𝑡𝑖𝑛𝑔𝑔𝑖 𝑙𝑖𝑚𝑎𝑠)
11
Hubungan kubus dengan limas
A
B
D
C
E
F
H
G
2a
2a
2a
A
B
D
C
E
F
H
G
T
2a
2a
2a
12
Volume kubusabcdefgh
A
B
D
C
E
F
H
G
2a
2a
2a
Luas alas:
𝐿𝑎 = 2𝑎 × 2𝑎
Tinggi:
𝑡 = 2𝑎
Volume:
𝑉𝑘 = 2𝑎3
= 2𝑎 × 2𝑎 × 2𝑎
= 2𝑎 × 2𝑎 × 2𝑎
= 𝐿𝑎 × 2𝑎
13
VOLUME LIMAS ABCDT
A
B
D
C
E
F
H
G
T
2a
2a
2a
Luas alas:
𝐿𝑎 = 2𝑎 × 2𝑎
Tinggi:
𝑡 = 𝑎
Volume:
𝑉𝑙 =1
62𝑎 3
= 1
6 2𝑎 × 2𝑎 × 2𝑎
= 1
3𝐿𝑎 × 𝑎
= 1
3 𝐿𝑎 × 𝑡
14
RUMUS VOLUME LIMAS
𝑉𝐿𝑖𝑚𝑎𝑠 =1
3 𝐿𝑎𝑙𝑎𝑠 × 𝑡
15
contoh SOAL
16
01
Sebuah limas tegak alasnya berbentuk persegi yang sisi-
sisinya 12 cm. Puncak limas tepat berada diatas pusat alas
dan tingginya 30 cm. Hitunglah volume limas .
Penyelesaian:
Diket:
S = 12 cm
t limas = 30 cm
Ditanya: V limas?
Jawab
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
3𝐿𝑎 × 𝑡
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
3 (𝑆 × 𝑆) × 𝑡
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
312 × 12 × 30
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
3 144 × 30
𝑣𝑙𝑖𝑚𝑎𝑠 = 144 × 10 = 1440 𝑐𝑚3
17
02
Sebuah limas tegak alasnya berbentuk segitiga sama kaki yang
memiliki Panjang rusuk alas 10 cm dan tinggi alas 12 cm. Puncak
limas tepat berada diatas pusat alas dan tingginya 8 cm.
Hitunglah volume limas .
Penyelesaian:
Diket: limas segitiga
a=10 cm
t alas = 12 cm
t limas = 8 cm
Ditanya: V limas?
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
3 𝐿𝑎 × 𝑡
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
3
1
2𝑎 × 𝑡𝑎𝑙𝑎𝑠
× 𝑡𝑙𝑖𝑚𝑎𝑠
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
3
1
2 × 10 × 12 × 8
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
360 × 8
𝑣𝑙𝑖𝑚𝑎𝑠 = 20 × 8 = 160 𝑐𝑚3
Jawab:
18
LATIHAN SOAL
19
Multiple Choice
1+1
1
2
3
4
Volume Bangun Ruang
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