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= 1/2 x 8 x 4
= 1/2 x 32
= 16 cm²
Luas persegi panjang = p x l
= 12 x 8
= 96 cm²
Luas yang diarsir = Luas persegi panjang - Luas segitiga
= 96 cm² - 16 cm²
= 80 cm ²
=8×12
=96
L segitiga= a×t÷2
= 8×4 = 32÷2 = 16
Lpersegi panjang - L segitiga = 96- 16 = 80