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L.persegi = s x s
=5 x 5
= 25cm²
L.segitiga = 1/2 x a x t
=1/2 x 6 x 6
=3 x 6
=18cm²
L.persegi panjang= p x l
= 16x10
=160cm²
L.arsir =160- (25+18)
= 160 - 43
= 117cm²