Rumus Cepat:
[tex]\sf EF=\frac{DF\cdot AB+AF\cdot CD}{DF+AF} \\\\EF=\frac{6\cdot 8+3\cdot 2}{6+3} \\\\EF=\frac{48+6}{9}\\ \\EF=\frac{54}{9} \\\\EF=6[/tex]
Jadi panjang EF adalah 6 cm.
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Trapesium sebangun
Rumus Cepat:
[tex]\sf EF=\frac{DF\cdot AB+AF\cdot CD}{DF+AF} \\\\EF=\frac{6\cdot 8+3\cdot 2}{6+3} \\\\EF=\frac{48+6}{9}\\ \\EF=\frac{54}{9} \\\\EF=6[/tex]
Jadi panjang EF adalah 6 cm.