Jawabanmu

2014-03-05T18:47:00+07:00
L=1/2.a.t
L=1/2.30.15
L=225 cm²
2014-03-05T18:51:46+07:00
Segitiga =  \frac{a x t}{2}
             =  \frac{30 x 15}{2}
             =  \frac{450}{2}
             = 225  cm^{2}