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= 1/2 × 7 × 5
= 1/2 × 35
= 35/2
= 17,5 cm2
b. L1 = Persegi panjang
L2= Segitiga
L1= p × l
= 17 × 15
= 255 cm2
L2= 1/2 × a × t
=1/2 × 15 × 10
=1/2 × 150
=150/2
=75 cm2
L1 + 2 = 255 + 75 = 330 cm2
Maaf, hanya dapat menghitung luasnya saja.
Tidak bisa menghitung luas sebenarnya.
Semoga bermanfaat.