How do we do the justification in the questions of constructing similar triangles?

Question

{ By similar triangles or by basic proportionality theorem (as in the book)}?

Answer 1

I think you should follow the steps of similar triangles or by basic proportionality theorem for justification.

This can help you understand the thing:

https://www.sarthaks.in/31405/draw-triangle-abc-which-4cm-6cm-and-9cm-construct-triangle-similar-%CE%B4abc-with-scale-factor

https://www.sarthaks.in/31398/construct-triangle-similar-given-triangle-with-sides-equal-corresponding-sides-triangle