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AC kuadrat = 12 kuadrat+5 kuadrat = 169
AC =169
AC = 13 cm
panjang de :
DE kuadrat = AE * CE
cara cari AE =
AD kuadrat = AE * CA
5 kuadrat = AE * 13
25 = CE*13
AE = 25/13
AE = 1,9
dengan begitu, CE = AC - AE = 11,1
Jdi, DE kuadrt = 1,9 * 11,1 = 21,09
DE = 4,5923 (dst) atau 4,6