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pxl=10x12
=120cm
luas2(segitiga siku2)
1/2xaxt=1/2x(16-12)x10
=1/2x4x10
=20cm
luas kesuluruhan
Luas1 + Luas2
120+20=140cm
L=1/2 x (a+b)xt
=1/2 x (16+12) x10
=1/2 x 28 x 10
=14 x 10
=140 cm