Tentukan banyaknya diagonal bidang dan diagonal ruang pada bangun ruang berikut. a.prisma segilima b.prisma segidelapan
dengan caranya ^^
5dregensleyerjawabnnya soal A Diagonal bidang d = n (n - 1) d = 5(5-1) = 5(4) = 20 diagonal ruang d = n (n - 3) = 5 ( 5-3) = 5 ( 2) = 10 jawaban soal B d = n (n - 1) d = 8(8-1) = 8(7) =56 diagonal ruang d = 8 (8 - 3) = 8 ( 8-3) = 8 ( 5) = 40
Diagonal bidang
d = n (n - 1)
d = 5(5-1)
= 5(4)
= 20
diagonal ruang
d = n (n - 3)
= 5 ( 5-3)
= 5 ( 2)
= 10
jawaban soal B
d = n (n - 1)
d = 8(8-1)
= 8(7)
=56
diagonal ruang
d = 8 (8 - 3)
= 8 ( 8-3)
= 8 ( 5)
= 40