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v=17x10/2 . 30
=85x30
=2550
18.
bangun kecil:
alas = segitiga
tripel pythagoras
9, (12), 15
tinggi segitiga=12
v=La.t
v=9x12/2 . 8
v=432
bangun besar :
alas segitiga
tripel pythagoras
18, (24), 30
tinggi sgitiga =24
v=La.t
v=18x24/2 . 8
v=1728
v total: 1728+432 = 2160