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V = 10x10x12 = 1200
b. tinggi sisi tegak
√12²+5² = 13 cm
c. LP =
10x10 = 100
10x13x4:2 = 260
LP = 360
Volume Limas = 1/3 La.t
1/3 100.12
100.4
=400
Luas permukaan Limas = La + 4(Luas selimut)
= 10.10 + 4.1/2.10.13
=100+260
=360