a. Luas bangun: 20×14= 280cm²
Bangun¹: 5×5= 25cm²
Bangun²: 5×5= 25cm²
Luas bangun yang diarsir:
=280-(25+25)
=280-50= 230cm²
Keliling:
=(20×2)+(14×2)
=40+28=68cm
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a. Luas bangun: 20×14= 280cm²
Bangun¹: 5×5= 25cm²
Bangun²: 5×5= 25cm²
Luas bangun yang diarsir:
=280-(25+25)
=280-50= 230cm²
Keliling:
=(20×2)+(14×2)
=40+28=68cm