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= (s x s) + (a x t per 2 x 4)
= (10 x 10 ) + (10 x 13 per 2 x 4)
= 100 + 260
= 360 dm³
luas seluruh sisi tegak limas = 4 x alas x tinggi / 2
diket :
alas = 10 dm
tinggi sisi tegak = phytagoras
= x² = 5² + 12²
= 13 cm
jadi 4 x 10 x 13 / 2
260 dm²
jadi lp nya 260 + 100 = 360 dm² (a)
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