Jawabanmu

Jawaban paling cerdas!
2014-06-09T19:02:17+07:00
Luas alas =18*18
= 324

luas sisi tegak
= 1/2*18*15
=135*4
=540

jadi luas keseluruhan
=324+540
=864
1 5 1
2014-06-09T19:02:37+07:00
Lpermukaan =(18x18) + (4x(18x15/3)
=324 + 360
=684 cm²