Question

triangles ABC and DEF are similar.
1)if ar(∆ABC)=9cm²,ar(∆DEF)=64cm² and DE=5.1cm,find AB​

Answer 1

Answer:

AB=1.91cm

Step-by-step explanation:

when two triangles are similar then the ratio of their area is equal to square of their corresponding sides.

ar(∆ABC)/ar(∆DEF)=(AB)^2/(DE)^2

9/64=(AB)^2/(DE)^2

3/8=AB/5.1

3/8×5.1=AB

AB=1.91