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t = 8 cm
dit : luas permukaan limas?
jawab :
luas alas = s × s
144 = s²
s =√144
s = 12
sisi tegak limas = √6² + 8²
=√36 + 64
= √100
= 10 cm
luas permukaan limas = luas alas + jumlah luas sisi tegak
= 144 + 4(¹/₂ x 12x10)
= 144 + 4 (60)
= 144 + 240
= 384 cm²
semoga membantu :-)
jadikan yang terbaik ya :-)