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= ( s.s ) +( 4 . 1/2 . alas .tinggi )
= ( 10.10) + ( 4 . 1/2 . 10 . 13)
= 100 + 260
= 360
Tinggi sisi tegak didapat dengan rumus phytagoras
= tinggi limas = 12 cm
rumus = luas alas + 4 × luas sisi
peny.
luas alas = s × s
= 10 × 10
= 100 cm²
luas sisi = 1/2 × a × t
= 1/2 × 10 × 12
= 1/2 × 120
= 60 cm²
luas limas = luas alas + 4 × luas sisi
= 100 + 4 × 60
= 340cm²
semoga membantu...