Jawabanmu

2014-04-14T18:09:32+07:00
 L_{1} = 12 × 8 = 96
 L_{2} =  \frac{1}{2} 12 × 15 = 90

  \frac{L_{1} +  L_{2} - L bukanarsir }{2}
=  \frac{ 96 + 90 - 36  }{2}

= 75