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L = 22/7 . 10,5²
L = 22/7 . 110,25
L = 346,5
Jadi, luasnya 346,5 cm²
= 22/7 x 10,5 x 10,5
= 22 x 1,5 x 10,5
= 346,5 cm²
jawabnnya 346,5 cm²