If ` ΔA B C ∼ ΔD E F` such that `A B=5c m` , area `(Δ A B C)=20\ c m^2` and area `(Δ D E F)=45\ c m^2` , determine `D E` .

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)=

If ΔA B C ∼ ΔD E F such that area of ΔA B C is 9\ c m^2 and the area of ΔD E F is 16\ c m^2 and B C=2. 1 cm. Find the length of E F .

If A B C ∼ D E F such that A B=1. 2 c m and D E=1. 4 c m . Find the ratio of areas of A B C and D E F .

Triangles A B C and D E F are similar. If area ( A B C)=16\ c m^2 , area ( D E F)=25\ c m^2 and B C=2. 3 c m , find E Fdot (ii) If area ( A B C)=9\ c m^2 , area ( D E F)=64\ c m^2 and D E=5. 1 c m , find A Bdot (iii) If A C=19 c m and D F=8c m , find the ratio of the area of two triangles.

Triangles A B C and D E F are similar. If area ( A B C)=36\ c m^2 , area ( D E F)=64\ c m^2 and D E=6. 2 c m , find A Bdot (ii) If A B=1. 2 c m and D E=1. 4 c m , find the ratio of the areas of A B C and D E F .

If triangle A B C is similar to triangle D E F such that B C=3cm ,E F=4c m and area of triangle A B C=54c m^2 . Determine the area of triangle D E Fdot

If /_\A B C and /_\D E F are similar triangles such that A B=3c m , B C=2c m C A=2. 5 c m and E F=4c m , find the perimeter of D E F .

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 .

In Fig. , A D bisects /_A ,\ \ A B=12 c m ,\ \ A C=20 c m and B D=5c m , determine C D

In A B C and D E F , it is being given that: A B=5c m ,\ \ B C=4c m and C A=4. 2 c m ; D E=10 c m , E F=8c m and F D=8. 4 c m . If A L_|_B C and D M_|_E F , find A L : D M .