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L2 = 1/2 x 22/7 x 14 x 14
L1 + L2 =
Luas Bangun = Luas Bangun A ( Persegi Panjang ) + Luas Bangun B ( Lingkaran )
Luas Bangun A = P × L
= 28 × 40
= 1120 Cm²
Luas Bangun B = × r²
= × × ( 28 ÷ 2 ) × ( 28 ÷ 2 )
= × × 14²
= × × 196
= × 616 Cm²
= 308 Cm²
Luas Bangun = 1120 + 308 Cm²
= 1428 Cm²
Jadi Luas Bangun Datar Tersebut Adalah 1428 Cm²