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In Fig. 4.178, D E B C (FIGURE) If D...

In Fig. 4.178, `D E B C` (FIGURE) If `D E=4c m` , `B C=6c m` and Area `( A D E)=16\ c m^2` , find the area of ` A B C` . (ii) If `D E=4c m ,` `B C=8c m` and Area `( A D E)=25\ c m^2` , find the area of ` A B C` . (iii) If `D E : B C=3:5` . Calculate the ratio of the areas of ` A D E` and the trapezium `B C E D` .

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In Fig. 4.178, D E∥ B C (FIGURE) (i) If D E=4c m , B C=6c m and Area ( A D E)=16\ c m^2 , find the area of A B C . (ii) If D E=4c m , B C=8c m and Area ( A D E)=25\ c m^2 , find the area of A B C . (iii) If D E : B C=3:5 . Calculate the ratio of the areas of A D E and the trapezium B C E D .

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