Question

plz help
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Answer 1

Step-by-step explanation:

i only know the answer for first ques

ie:

16:81

because the ratio of the squares of a similar triangle is equal to the ratio of their area

Answer 2

Answer:

Q.2

C) 15 cm

Step-by-step explanation:

Let DE be y and DF be x

Using similarity,

EF/BC = DF/AC

4/2 = x/ 2.5

x = (2.5×4)/2

x = 5 cm

Therefore, DF= 5 cm

Now, again by using similarity

EF/BC = DE/AB

4/2 = y/3

y= (3×4)/2

y = 6 cm

Therefore, DE= 6 cm

Add all the sides now

Perimeter of ∆DEF

=> DE + EF + DF

=> 6 + 4 + 5

=> 15 cm