Jawabanmu

2014-06-02T23:35:27+07:00
Sisi persegi = 18 /  \sqrt{2} = 9  \sqrt{2}
tinggi limas = √15² - (18/2)²
tinggi limas = 12
volume = 9  \sqrt{2} * 9  \sqrt{2} * 12
volume = 1944