bagaimana cara mengerjakan nya

<p>Luas total = Luas A + Luas B</p><p>A: persegi panjang</p><p>B: segitiga</p><p>&nbsp;</p><p>Luas A &nbsp;= panjang x lebar</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 15cm x 10cm = 150cm²</p><p>&nbsp;</p><p>Luas B = ½ x alas x tinggi</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= ½ x (5cm + 10cm + 5cm) x 10cm</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= ½ x (20cm) x 10cm</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= ½ x 200cm²</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 100cm²</p><p>&nbsp;</p><p>Luas total = 150cm² + 100cm²</p><p>^{&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;} &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 250cm²</p>