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In DeltaA B C and DeltaD E F , A B"\ "="...

In `DeltaA B C` and `DeltaD E F` , `A B"\ "="\ "D E` , `A B"\ "||"\ "D E` , `B C"\ "="\ "E F` and `B C"\ "||"\ "E F` . Vertices A, B and C are joined to vertices D, E and F respectively (see Fig. 8.22). Show that (i) quadrilateral ABED is a parall

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In Delta ABC and Delta DEF , AB = DE, AB|| DE , BC = EF and BC|| EF . Vertices A, B and C are joined to vertices D, E and F respectively (See fig.) Show that quadrilateral ABED is a parallelogram.

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In Fig. 7.21, A C\ =\ A E , A B\ =\ A D and /_B A D\ =/_E A C . Show that B C\ =\ D E .

E and F are respectively the mid-points of equal sides AB and AC of DeltaA B C (see Fig. 7.28). Show that BF = C E .

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If Delta A B C ~ Delta D E F such that B C=3c m , E F=4c m and a r( A B C)=54 c m^2 , then a r( D E F)=