Sebuah Limas dngan alas belah ketupat mmpunyai keliling alas 100 cm. Jika panjang diagonalnya 40 cm & tinggi Limas 18 cm. Tentukanlah panjang Diagonal lain & volume Limas nya ???....
5dregensleyer
Sisi miring s = 100: 4 = 25 diagonal lain
D2 = 2 x 15 = 30 volum = D1 x D2 : 2 x t = 30 x 40 x : 2 x 18 = 30 x 20 x 18 = 600 x 18 = 10.800cm³
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syafiraprinces
mohon maaf, rumus V limas belah ketupat itu V = 1/3 x luas alas x tinggi
s = 100: 4
= 25
diagonal lain
D2 = 2 x 15
= 30
volum = D1 x D2 : 2 x t
= 30 x 40 x : 2 x 18
= 30 x 20 x 18
= 600 x 18
= 10.800cm³
sisi miring belah ketupat = = 25cm²
25² = 9² + 1/2d2²
1/2d2²= 25² - 20²
1/2d2² = 625 - 400
1/2d2 =
1/2d2 = 15cm
d2 = 15cm x 2 = 30m
volume = x luas alas x tinggi
volume = x x 40 x 30 x 18
v = x 40 x 30 x 18
v = 40 x 5 x 18
v = 40 x 90
v = 3600cm³