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2.16 rusuk dan 9 sisi
3. 20 rusuk dan 10 sisi
sisi banyaknya ada = 7 + 1 = 8 sisi
2. rusuk ada = 8x 2 = 16
sisi ada = 8 + 1 = 9
3. rusuk ada = 10 x 3 = 30
sisi ada = 10 + 1 + 1 = 12