Luas limas
Presentation
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
Musliatin Fitria
Used 2+ times
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6 Slides • 0 Questions
1
limas adalah bangun ruang tiga dimensi yang dibatasi oleh alas berbentuk segi-n dan sisi-sisi tegak berbentuk segitiga.
Pengertian
Nama Limas tergantung pada bentuk alasnya, jika berbentuk segi empat maka dinamakan Limas segi Empat
Nama Limas
Bangun ABCD = Alas limas
Bangun TAB, TBC, TCD, TDA = Sisi Tegak
TE = Tinggi Limas
TF = Tinggi Sisi Tegak
TA, TB, TC, TD = Rusuk Tegak
AB, BC, CD, DA = rUSUK ALAS
Bagian2 Limas
2
L = Luas Alas + Luas Sisi Tegak
pada gambar disamping Limas Segi empat
L = AB x BC + 4 (1/2 x BC x TF)
Luas Permukaan Limas
*Rumus luas alas disesuaikan dengan bentuk alasnya
3
4
Diketahui : TP = 36
TQ = 39
TPQ membentuk segitiga siku-siku di P
PQ2 = TQ2 - TP2
= 392-362
= 1521 - 1296
= 225
PQ =√225
PQ = 15
5
PQ SEJAJAR AB
PQ I/2 AB. MAKA AB = 2 X 15 = 30
A. Keliling alas berbentuk persegi = 4 x 30 = 120 cm2
B. Luas Permukaan Limas
= L.alas + 4 x Sisi Tegak
= (30 .30) + (4 x ½ . 30 . 39)
=900 + 2.340
=3.240 cm2
6
limas adalah bangun ruang tiga dimensi yang dibatasi oleh alas berbentuk segi-n dan sisi-sisi tegak berbentuk segitiga.
Pengertian
Nama Limas tergantung pada bentuk alasnya, jika berbentuk segi empat maka dinamakan Limas segi Empat
Nama Limas
Bangun ABCD = Alas limas
Bangun TAB, TBC, TCD, TDA = Sisi Tegak
TE = Tinggi Limas
TF = Tinggi Sisi Tegak
TA, TB, TC, TD = Rusuk Tegak
AB, BC, CD, DA = rUSUK ALAS
Bagian2 Limas
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