Question

4.
Given AABC ~ ADEF. If AB = 9cm; DE - 5.4cm; Perimeter of ADEF - 15 cm;
find the perimeter of AABC.​

Answer 1

Answer:

I think right answer

Step-by-step explanation:

As per the dimensions give in the questions,

Now, we have to find out the perimeter of △ABC

Let △ABC∼△DEF

So, AB/DE=AC/DF=BC/EF

Consider, AB/DE=AC/DE

4/6=AC/12

By cross multiplication we get,

AC=(4×12)/6

AC=48/6

AC=8cm

Then, consider AB/DE=BC/EF

4/6=BC/9

BC=(4×9)/6

BC=36/6

BC=6cm

Therefore, the perimeter of △ABC=AB+BC+AC

=4+6+8

=18cm.

solution

Answer 2

Step-by-step explanation:

P(ADEF)=15

15=2(5.4+x)

7.5-5.4=x

x=2.1

p(AABC)=2(9+x)

=2(11.1)

=22.2