lw +1/2 bh
A = 4 × ( 10 / 2 ) + 3 × ( 10 / 2 )
A = 4 × 5 + 3 × 5
A = 20 + 15
A = 35 cm ²
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lw +1/2 bh
A = 4 × ( 10 / 2 ) + 3 × ( 10 / 2 )
A = 4 × 5 + 3 × 5
A = 20 + 15
A = 35 cm ²