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sisi = √ 36
sisi = 6
a = 1/2 x s
= 1/2 x 6
= 3
luas selimut = luas 4Δ tegak
Ls = 4 ( a x t )
= 4 ( 2 x 7)
= 4 ( 21)
= 84 cm²
jawabnnya 84 cm²