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Verified answer
L =1/2×jumlah siai sejajar(a+b)×tinggi126 =1/2×(14+10)×t
126 =1/2×24×t
126:1/2=24×t
126×2/1=24×t
252=24×t
252:24=t
10,5 =t
jadi kalo dibulatkan t= 10m(D)