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Jangan tertukar antara sisi dan diagonal.
Bag a.
K = 4s
K = 4(17)
k = 68 cm
Bag b.
Nomor 7.
Dengan diketahui demikian,
Sehingga,
Nomor 8.
Beri pengandaian:
Sehingga,
Sehingga,
AC = 4k
AC = 4(5)
AC = 20 cm
BD = 3k
BD = 3(5)
BD = 15 cm