Hence triangle is scaled by multiple of 3.
What is scaled image ?
When we talk of two triangles ABC and DEF, they are said to be scaled if both they follow [tex]\frac{A}{D}= \frac{B}{E} =\frac{C}{F}[/tex] where all sides have same common difference.
How to solve?
Let triangles with sides 12,15,9 be ABC and triangle with sides 4,5,3 be DEF.
Now A/D=12/4=3
similarly B/E=15/5=3
and C/F=9/3=3
Hence , triangle is scaled by multiple of 3.
Learn more about scaled triangleshttps://brainly.com/question/2826496
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