
Bangun Ruang Limas
Presentation
•
Mathematics
•
8th Grade
•
Easy
Ahmad Zulfikri
Used 3+ times
FREE Resource
16 Slides • 5 Questions
1
Multiple Choice
Nama bangun ruang ini adalah ....
prisma
kerucut
limas
kubus
2
volume limas
Oleh : Ahmad Zulfikri
3
Multiple Choice
Manakah gambar yang bukan termasuk bangun limas adalah ....
4
5
Contoh nyata bentuk limas
Piramida, Mesir
Louvre Museum, Prancis
Masjid Agung Demak
6
MATERI
7
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
8
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)
9
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
10
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
11
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
6 2𝑎 3
= 1
62𝑎 × 2𝑎 × 2𝑎
= 1
3 𝐿𝑎 × 𝑎
= 1
3𝐿𝑎 × 𝑡
12
RUMUS VOLUME LIMAS
𝑉𝐿𝑖𝑚𝑎𝑠 =1
3 𝐿𝑎𝑙𝑎𝑠 × 𝑡
13
contoh SOAL
14
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
3 𝐿𝑎 × 𝑡
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
3 (𝑆 × 𝑆) × 𝑡
𝑣𝑙𝑖𝑚𝑎𝑠 =1
3 12 × 12 × 30
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
3144 × 30
𝑣𝑙𝑖𝑚𝑎𝑠 = 144 × 10 = 1440 𝑐𝑚3
15
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
2 𝑎 × 𝑡𝑎𝑙𝑎𝑠
× 𝑡𝑙𝑖𝑚𝑎𝑠
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
3
1
2× 10 × 12 × 8
𝑣𝑙𝑖𝑚𝑎𝑠 = 1
3 60 × 8
𝑣𝑙𝑖𝑚𝑎𝑠 = 20 × 8 = 160 𝑐𝑚3
Jawab:
16
17
LATIHAN SOAL
18
Multiple Choice
Salah satu bangunan berbentuk limas terbesar di dunia adalah bangunan Piramida, yang terletak di negara ...
Arab Saudi
Mesir
Uni Emirat Arab
Turki
19
Multiple Choice
Volume limas tersebut adalah ...
300 cm3
400 cm3
500 cm3
600 cm3
20
Poll
Bagaimana perasaan Ananda setelah menerima pembelajaran hari ini?
21
Terima kasih
Nama bangun ruang ini adalah ....
prisma
kerucut
limas
kubus
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