Jawabanmu

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2014-03-16T16:43:19+07:00
Sisi belah ketupat = 60/4=15
phyitagoras 15, 12, 9
diagonal lainnya 18 maka luasnya di dikali d2 dibagi 2 maka 24.18/2=216
2014-03-16T16:44:19+07:00
60/4 = 15 24/2 = 24 :2 = 12 d1 = triple phytagoras : 15, 12,.... (=9) L = 1/2.d1.d2 1/2.24.18 = 216 cm2